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Lecture 07. Acids and Bases. Pt. 4.


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Title Lecture 07. Acids and Bases. Pt. 4.
Title of Series Chemistry 1C: General Chemistry
Part Number 7
Number of Parts 26
Author Arasasingham, Ramesh D.
License CC Attribution - ShareAlike 3.0 USA:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this license.
DOI 10.5446/18996
Publisher University of California Irvine (UCI)
Release Date 2013
Language English

Content Metadata

Subject Area Chemistry
Abstract UCI Chem 1C General Chemistry (Spring 2013) Lec 07. General Chemistry -- Acids and Bases -- Part 4 Instructor: Ramesh D. Arasasingham, Ph.D. Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. Index of Topics: 0:00:00 Review of Carbonic Acid Example 0:15:43 Hydrolysis 0:18:10 Acid Base Properties of Salt 0:39:00 Calculating pH of Salt 0:47:09 Arranging Compounds from Most Acidic to Most Basic
OK I'm not everyone's attention please I was going to stop any questions before it begins so that Member we start last time at the point where we were looking at public Prodi gasses and Polly protested those acids that have more than 1 missile which will protect the rights and we said that we will have more than 1 indissociable protons there in the protons come off sequentially and all these competing equilibria arrived cell we took the
example of carbonic acid last time and if you guys remember carbonic acid has too acidic it's got to be sociable protons and we said that when they come off on the 1st day that we have the 1st proton coming off so that now you have a junior mine and this and I'm form and in 2nd step the 2nd Proton himself and you see that happening it's always said we look at but we have sequentially protons coming off then we have more than 1 acid dissociation constancy of K 1 and K and with in the case of polyphonic gasses K 1 is always larger than Kate to irritated 3 investors should not be demarcated 3 and taking too will be greater making 3 and so on and so forth all right and because of the magnitude of the 1st test of dissociation constant and the 2nd acid dissociation constant we can make a rock we can make some estimates about the relative concentrations of all the species in solution Andrews said did take the 1st step In the 1st that we said OK 1 is turned to the negatives of so that means the 1st it's a weak acid are direct to seal Teresa weak acid and because Kerry is so small what is that tell us about that equilibrium composition is going reactants was a good which would products reactants receive that is attend to the negative 7 so that is the 1st equilibrium all laws so these approximate numbers that you can't almost 99 . 9 9 % is the and only a very small . 0 1 per cent perhaps is on the side is exempt at equilibrium so that's the composition that he would establish from the first one that we want the 2nd equilibrium now what happens is the 2nd equilibrium K A 2 it's tend to the negative level so the 2nd equalizer was also a weak acid and it's a bulldozer also underlined the reactants Soviet . 0 1 per cent at the start of year and now you have . 0 1 % on this side but all of this will lie on this site can you receive that so that this this will remain approximately 2 . 0 1 per cent and only a very small amount of copying and I'm still 3 to minors will be there in equilibrium mixture so we want a kind of estimate the relative magnitudes of the concentration we know in this mixture the major species is going to be that because that could be the largest amount then we would call this the minor species it's gonna began amount and then for a lack of anywhere wouldn't say this amount is so small I wouldn't minuscule OK and that's because it's going to be there and lesser amounts than even the minor species are at sundown set about to calculate this would so at the end of class last time we went through an example nepali predicts problem and we were and you guys remember we said so understand quickly go to the calculation because we kind rush to it at the end of class last time so we were asked to calculate of all the species that are there you have a point 0 3 4 molar concentration of carbonic acid the guys remember we started with the 1st equilibrium which said you deal with this In the sequence right and the when start by looking at the 1st equilibrium and if we just look at the 1st equilibrium then we can say that we started with the initial amount of . 0 3 4 and then we had To begin with the no-huddle mine and no it's youth remind right and that equilibrium we can set up the equated the expressions and we know and equilibrium this is going to be 0 . 0 3 4 minus X X X you can put an equilibrium expression make approximations because this case tents to 7 and you can figure out what exercise next comes out to be 1 . 2 times 10 to the negative for and then we validate our approximations of you know we check validation we know it's well below a five-percent threshold so when looking at the concentrations that come from the 1st that we know that age to seal 3 would be pointless 4 minus X this axis so small compared to . 0 3 4 that then the significant range Sydney figures that were looking and concede hardly changes the concentration of the initial the concentration of H 2 0 3 Chilean that . 0 3 4 Hi during my concentration we won .period 2 times said the native or because that would be addressed in a single to miners would be 1 . 2 times that the negative for forces well now this is what we usually do if we had just won the provision taking place salute stop at that point right but now we have a 2nd step where we have now another competing equilibrium when now the 2nd Proton comes up all right so we want to look at the deportation of the 2nd Proton then we'd put the 2nd step now we want the appropriate equilibrium and we know that to is full . 8 times tend to make the level now for the 2nd step because the 2nd step relies on the products formed the 1st if you take the 2nd step by initial concentration of its you remind us will be the concentration of 8 O to minus that comes from the 1st day battle we calculated that was X and the 1st step to see that so now this would be the initial concentration of its sealed 3 miners were not concerned about the constitutional model but over here we don't have joined in mind as well because the 1st step in forming hydrogen mind as well so the hydro undermined that comes on the 1st day would be the initial concentration behind to the 2nd step all right and of course we have none of this so now to let the reaction because we haven't 0 carbonated know that this reaction has to proceed in the forward direction it is proceeding the 4 direction than the relative changes for the 2nd step and just so that we don't confuse get confused with actually use a different value why so now for the for the test this would be negative plus Y plus wine so then and at equilibrium we can say you have 1 . 2 times in the negative for minus why this would be 1 . 2 times at the Naval plus wine and wine all right and in cement we can look at the equilibrium expression for the 2nd step which is Kate 10 which is 4 . 8 times since the negative 11 that controls the Hive journeyman concentration times the company and concentration divided by the ABC 3 miners ,comma concentration are right and this would be 1 . 2 times at the Naval plus 1 times wide divided by 1 . 2 times at the 94 -minus wife it's not going to keep them out simple we don't ask ourselves can we make an approximation and you look at the kid value the K 2 was tend to the negative level that's an extremely small number are right that means the reaction is proceeding in the forward direction it's only going to react to very very small extent all right and therefore that wine has to be extremely small all right so what we do this will make the approximation and so we say this 1 . 2 times said the negative for plus would equal that in mind is why would people that's what we're saying is why it is so
small that neglected so we put that back in this equation now you can see the accounts loud and therefore Y comes out to be 4 . 8 times 10 to the negative London arrived and at this point we would have to check the validity check will let it be said that that comes out of the 4 times 10 to the negative % if you take this number divided by 1 . 2 times since the negative 11 times 100 see that that falls way below a threshold of fear that number is so small that we can actually collected that it so now we can go back and say that we know what y years and the company that concentration is why so this equals and that comes out to be 4 . 8 times tend to negative Levin Moeller you notice this that very often but when you look at the 2nd Proton coming off that the concentration of carbonate will actually OK too because those 2 value the high during my concentration and buy coverage that it's suits you might constitute cancel each other out so in all cases you'll find that it actually equals the key to values all right so far now in conclusion let's put all the concentrations so we said that HQ sealed 3 it is we already calculated that in the 1st and the H 2 0 3 concentration comes from the 1st at this point 0 3 4 Moeller now the next 1 is a sealed 3 miners now that it's European minus comes from 2 steps are right it comes from the 1st as well as the 2nd step in the 2nd step we know that the ACO t-minus is 1 . 2 time 84 -minus wine which is 1 . 2 times said the negative for minus 4 . 8 times tend to native 11 Tuesday this number is so small compared to the that the concentration is 1 . 2 times 10 in other words the concentration of 8 C O 2 miners comes primarily from the dissociation of the 1st step days and then you take the high joining mind concentration I don't mind concentration is 1 . 2 times since the negative for plus which is 1 . 2 times Anthony before plus 4 . 8 times 11 which once again is 1 point type .period . 2 times detonated for more alert and and lastly we look at the company and concentration and we know that the covering iron concentration equals a constitution of Y which is 4 . 8 times tents the 11 mall so what we're that what we've done is the capital concentrations of all the species in that solution and everyone rank these concentrations and you see that think that the concentrations that calculated by 1 a rank them this would be H to seal to be that's much larger the conservation that is much larger than 8 sealed 3 minors all right and 8 C O 2 miners and dates to your class are the same all right and then this will be much larger then the company can concentration and memory that was what we started after that was sort of in compared to the assumption that we made at the beginning is based on the equilibrium constant you can see that these concentrations that we calculated fall within that same as well now finally they ask you to calculate the pH of the solution then we know that the high joint airline concentration equals 1 . 2 times tend to negative for more alert therefore pH would be the negative log of that and if you take the negative laws of that number let's see what you end up where you get 3 . 9 2 all right so give Unocal commitment to calculate tournament concentrations figure the Peter that solution is now remembered as the assets it is up to you to come out to the city yet so we know that our calculations on on the right track all right so not to notice that carrying on homework alright and some of the themes that are being developed here isn't at the inauguration of a checklist about some skills that mastered arrived and 1 of those skills is that I will be checking when I test urine is you know don't you the pH we gasses erecting cannot the pH of a strong acids are the new happen appeared to the strong base the new counted the pH to the weekdays are at the new count the pH of a public protests in articles the skills and doing the online homework you'll see that if you take a weak acid and their review the concentration you start with initial concentration and ask the captain Peter all right or building the pH of the solution and the equilibrium constant and ask calculate initial concentrations or that review appeared to the solution and the initial concentration after the property December so it's the same thing is that you know you're working in 2 different directions but those are the skills they need to master now there's 1 unit that see coming up and I don't want to get torn and that's the homework that's due tomorrow that talks about hydrolysis right now we use a wood hydrolysis is whenever moderate Islam all right so hydrolysis is a generic term right so you use wood hydrolysis it started hydraulic hybrid means what water license means what to break up I write in all of these efforts associations to members of the review of water are right when it is basically a of wanted to review which minds are right selectivity of water Street didn't last that clings to another water steel plots to see them so will use word hydrolysis delegates will not the same thing as key indicate the Joint Center alright so it's just that every phrase in a different ways they just get comfortable looking at this from different angles so you get that unit on hydrolysis it's the same thing they give you instead of giving you can't they say the hydrolysis of equilibrium so instead of saying acid dissociation constant hydrolysis I write because acid dissociation constant and based associations also hydrolysis because in both cases is played water so acid is instead of saying acid dissociation visited the hydrolysis of water and unique ways and you should be able look at the equation and say all that the alright and then they and then they want to calculate all right and you know what is the message reading Kincaid take times KB also kW on that's all it is all right and so on I just don't get torn off by the terms that using but they just want to get used to some of those terms because they feared by major easygoing taking by chemistry and so on very often they use the wood hydrolysis office and said should be able to look at that and figure that was love again with so any questions at this point so we looked at asses and we said we can have the gas strong acids we looked at basis with the fact that you can have weak bases or strong basis and then we looked at Poly Prodi gasses and just like gas and you can have Polly basic substances as well in the same process applies except that now for those who have kidney 1 GB to break known want to looking at
the 3rd touchdown and that topic is acid-base propagandist of salts came itself now we use of words salsa before can you give me another word for salts finding conference right so in other words assaults on his compounds in all of you know we've looked at I'm compounds in great detail you know how to identify and comprehensive study however can find and online because of a combination of a medal In all right and so salts are also called the ionic compounds now attendants also can be even soluble or insoluble in water so depending on the type of salt you can have some salsa that insoluble and some solves that soluble all right and that I will see that the ones that don't dissolve called insoluble and we also called them precipitates a rights if you take I'm compounds not all highly compensated dissolved in water from the Jordan do but there are many that are insoluble and so in this case we to consider all the soluble once a writer so in the case of soluble salts so Jake soluble salts can act as an accident basis for or being neutral In what Eriksson depending on the salt some so didn't get only the ones that dissolve in water you can it's also the soluble insoluble if the soluble solids begin act some salsa connectors an asset some salsa connectors of babies and some somersaults in neutral so little of had to identify whether 1 it's a solid out there it's going to be an asset base or neutral state so To look at that wouldn't categorize them into 4 groups so we'll start with and I it's a case of the 1st 2 years -dash salsa them consist of an island arc that by the conjugate bases of strong passes case also consist of an alliance that are conjugated bases of strong acids by neutral in what right so memorable looking at bases of strong acids said Jimmy an example of a strong acid it's the on what is the conjugate base of 8 still minus Najimy assault that has sealed minus in to see that so you take in ACL now ACL His assault it's that can and Anaheim and so on on In has sealed minors which is the conjugate base of a strong acid and these will be neutral in water you put sodium chloride and 1 the pH will be sad to see that and the reason is that is the conjugate base of a strong acids the kind base of a strong acids we bases is so weak that the weaker than water and that while there is a strong base so that's why you place them in water that is the extremely weak bases there so weak in water but you look at the scale and see that water is a stronger base again and again I'm sure go back to the table that we looking at and remember these are all strong acids these other strong acids these are the kinds of bases so member when you look at conjugate base as the strongest bases at the bottom as you go up on the basis that we can we can we go here now water comes here and all of these bases are weaker than what I write a lot a stronger base these so lotteries can act as a base because water is a stronger base just get that and therefore in water it's going to be neutral right and sell you can take sodium chloride and we said chlorate Casey loss for the question so this is Casey IL 4 that's a strong but the conjugate base of strong acid you can take up any and all 3 it closed and etc. These are all examples of salts that contained alliance that our country faces a strong acids now if you take the 2nd group of an iron salts that consist of an alliance that on the conjugate bases weak acids yeah yeah so when looking at conjugate bases of weak acids and looking on bases in water rights and now to take the conjugate bases of weak acids we said it but we have a weak acid its conjugate base will always be weak right so somebody asked me in discussion you guys are talking about this and I had somebody asked me about this so I know we talked about the fact that these acids are strong so the continent bases of strong acids will be very very weak basis that is so weak that they can act as a basin water now if you look at least in this range news all week bases are right so the conjugate base is a weak acids will be weak so you have a weak acid when asked this question to the other class unite asks them with the conjugate base so we strong or weak every said because the acid is weak and that was the basis is strong not really jumps if the acid is weak its conjugate base is also because cable times KB has to be tested negative for so OK it's tend to the negative too Is that a weak gasses are strong acid content to so we just so case tend to the negative too is a weak acid that can you tell me what would the kidney come out for the conjugate base of that we gasses that sent the native to what is a correspondent KB for this country based detonated 12 to see that titillated 12 is also we can see that so always available weak acid its conjugate base will also be alright and so that's what we're seeing here so now we're looking at the conjugate bases of weak acids
and they will act as a base in what right and so they're acting as a basin water examples of this would be things like you have sodium cyanide here you have sodium acetate which is the acetate and or if you have so it was or if you have something like potassium chloride these are all conjugate these all have so far circle these were looking at is the identify 1 circle the Anaheim to concedes he's all well here the conjugate bases of weak gasses and therefore that act as a base in water so let's take this divide sodium cyanide and put it in water Kaneria see that to begin with this starts with an ionic compounds and we said when I come home dissolves in water it hit its in Thailand structure disintegrates and so the whole structure falls apart and we saved associates and when associates he gives you any plus plus minus so the 1st step in as many part of salt and water it breaks apart because it's also at crystallize right think about sodium chloride sodium chloride is a white crystalline material the instant take that salt and bread and water what happens it dissolves completely in water and we dissolves it means that the whole structure falls apart are right and so you have dissociation taking place and then after this association is complete now this is neutral and this will be based on right and now because its basic it's the kind base of a weak acid and the reason it's amazing he's you will establish its them in water it's going to give you a CNN request plus 0 which minus inquests right where this is the base this is the assets for the reverse reaction this would be a conjugate acid and this would be the conjugate base all right and because this is the conjugate base of the weak acid CNN this would be kidney and we know that in tables usually you get these values as stated for a CNN interview Friday CNN you can put in that equation and you can Fidelity years all right and that weak base and so it can act as a weak based water right and can you guys do the same thing at home so you take acetate giblets sodium acetate and water the 1st time at the will associated give you the acetate and the sodium can and then this will act as a weak basin water because you can establish that equilibrium standing with their minds right now on the 3rd it was so optimistic .period if you look at these 2 has to deal with Anaheim's are acknowledged that the contents of the the 3rd option is now Catalans and so it turns out salsa that consist of Canada irons that are conjugate assitance of meat bases on a sitting in water Sinaloa looking at Cat Island a mediocre Canada looking at the conjugated asses of a weak base can you give me an example of a Greek base ammonia are so long ammonia is a week based what is the conjugate acid so that we In its full plus a right to be take each for class in water now that can act as a gasses so an example would be a In foresee out to mutate in for Seattle and 1 that we're interested in looking at is the far-right so this is the conjugated ass said of the week base in each to be because it's
the conjugate acid of the wheat berries and 3 you have useful class and this would be a city now invited the end I know there's what is this an minus and what we know is still minus acidic or basic 0 minus is the conjugate base was strong acid a week passes strongest and where we know about the conjugate bases of strong acids they are neutral so it turns out this will be neutral and that was the acidic so soil were all the solutions and music are right and so why is this so that we know that NH for loss In water will act as a very gas said to give you an 8 8 3 0 plus 8 worse plus N H 3 where this is the ass said this would be the basis for the rest reaction this would be the conjugate asset and this would be a conjugal base and this represents kph and if ever they give you carry for NHC communicate the French terrain or caper in each for plus you can with 1 from the other way and because this acts as an acid
solution this will act as an asset so this is what we're taking what we've learned is moribund now we're taking it to a higher level and we're looking at more complex I'm probably right and I will it's also an end result will have a chance Indiana all right so I could go out you have to look at the cat I'm part of it and ask service academy actors acid were based on the Internet and I need ask will that and act as base all right now lastly location can I use of 1 and grew to metals are always neutral so if you take medalist looking at who won in Group 2 medals and determining a periodic table we said that you take metals you can categorize them into groups 1 group to and where they are their majority of metals in the pier table when we call them transition metals are right so it turns out 1 group to metals are always neutral transition metals I'm not neutral they tend to be acidic and solutions are right so From this class every time a company that has a cat and it's going to come from Group 1 and Group 2 alright because transition metals tend to be we gas it's like you take iron in water I'm can psychiatry Plus will act as a weak acid right so it turns out had added 2 . medals always Neutral Transition Metals I have a city properties they can be extremely weak but still enacted passes so we're going to kind of put this level of class or kind that transition metals and the type of examples you can see will come from Qatar that opened 1 the dominant group pilot sodium potassium rubidium cesium and someone came and so the history applied to cats are right so it is studying at home and that's what I have you have to be able to do you have to be able to look at Africa face properties of salsa and then and now we need to go on to remember when we got acid is 1 of the fundamental skills that you need to be able to do is handicapping the pH of a strong accident happened future recast can calculate the pH of a strong base recapping the pH of the weak base you can appeared apply for gas now we don't ask this of character the Peter all right so would take some examples of this in the cell this is not very complicated once you know you can categorize new-look Indiana Indiana is the conduit in the face of a strong as it's going be neutral if you look at the end the conjugate base of a weak acid it's going to be right you take care of and it turns out that the only example these examples of very very few are cat and that conjugate acid the week basis all right there you can alliance of conjugal acids and bases and you'll example that you will encounter is in it for plus I write to go to that list acids in the country bases that I gave you and if you look at that list there are a few examples on that list with where your conjugate base on that other the conjugate acid of a weak bases actually can find many of them a neutral all right did not tenants all right and so the only example that you will encounter most often in the 1 that I want to remember is NH 4 plus a in of course who once cannons right so now let's not taking some examples you look at that were achieved that that underclass websites and talks about acid-base properties of salts this take an example we want calculated the acid-base problems of sorts where my kind of remind you guys this is it's the saying approach that we are using all along that every example to don't get thrown Friday July 11th sodium fluoride content the pH of appointed durable solution of sodium fluoride OK so the starting point is to look at the formula the compound and ask yourself what kind of compound because it's got sodium at a metal and so right and non-metal it's a cat I'm in and I'm combination you know that this is assault or I'm company are right and therefore we know that if you take sodium fluoride right and when this is dissolved in water Italy immediately 4 this a right so even
know of sodium fluoride initial concentration was . 0 3 more alert but instead it dissolves remembered associate and breaks apart completely sold human we want the concentration as if the continent and associated together in reality in water they have dissociated all right so we start with . 3 Moeller of the US can you see that in reality in solution what we have is . 3 more of that and . 3 more of that because its assault it's a soluble salts and it dissolves in water even know we write the formula as the associated together in reality the moment they dissolve in water the whole structure disintegrated into dissociated so that means that going have . 3 Waller's sodium can irons and point the fluoride and and you will get so we never see that sodium is good 1 therefore the Kenai and is neutral you take the and this is after minus now even if you're not quite sure you look at the table and you're looking for a major F minus a few go down you can see agent at minus are right now this is important because if if you take Group 7 which is chlorine and bromine and so on but you know is this fall in a weak acid but chlorine bromine ID a strong acids all right so remember that Florian actually behaves differently then chlorine bromine iodine there'd be a strong acids but chlorine is a weak acid so is a weak acid its conjugate base has to be meet as well so we
know that this is the conjugate base of a league asset and therefore it is going to be basic all right so now that we know that we have 1 neutral components so we're not concerned about that that's not effect the key to the solution but the other component is going to affect the P-2 the solution and that he is willing to say now the equilibrium that would be established would be as miners in water will give me hm plus which minus a right answers were riding in it in the form of the conjugate base which is based 6 were actually interested in looking at the beach but do they give us big mistake so all
we have to do is clean up the air Fabian it's kW divided by Kate which is 1 times 10 to negative 14th divided by 6 . 6 times since the negative for and that comes out to 1 . 5 times on the TSE 11 under for the that tension negative 11 are right so now we all know that this is extremely weak base its tend to the negative 11 right so now and we have to figure out what is the key to the solution of 1 of the creators of the foregoing the hydroxyl concentrations Our right so that we start with the initial all right the concentrations of we have .period 3 0 Moeller F minus were not concerned about water this is going to be 0 0 to begin with a data so we know the reactions in a proceeding that direction just establish equipment so that I look at the change in terms of malaria this would be negative acts plus plus X were not concerned about water tape therefore any equilibrium if I want to look at the malaria this will be . 3 0 minus X This is the X X or so we'll work tons of problems using this approach a again now we're looking actually beach KBE is a really small number for sponsoring a 1 . 5 times detonated 11 and we know that the walls that age of concentration times the hydroxide and concentration minus F minus witches X where mobile . 3 0 minus X since this is tend to the negative love and we know of his x is going to be extremely small Connecticut approximation yes so much from approximation is very . 3 0 minus X is going to be . 3 0 all right and therefore I can go back and say now 1 . 5 times tend to native 11 equals X squared .period between 0 and therefore I sulfur acts it comes out to be 2 . 1 1 times 10 to the negative 6 Moeller now quickly checked for validity date is approximation valid and that would be 2 . 1 times 10 6 Moeller and saying that this concentration is really small compared to . 3 0 and that comes out to be 7 times 10 to the negative for so that is really small number so we can see that approximations pretty good right so now that we know approximation is valid member ultimately would likely to calculate I need to counter the pH of the solutions are that means we have calculated hydroxide and concentration and we know the hydroxyl concentrations cause X which is 2 . 1 times 10 6 so now I didn't have a pH so as all of you know now I need to convert the hydroxide iron concentration to figure out what the high during my concentration is or you have a number of calculated take negative longer that and that will give me the OH and that comes out to a 5 . 6 8 and then I know pH it is 14 minus 5 . 6 8 which gives Maine 8 .period 3 2 all right so moment this is an extremely weak players and therefore the PHS to tell me what the solution is basically that the pH have recalculated indicate that the weak peso yes the pitch comes out of it . 3 2 right so this is an example assault acting as a means please note that your worksheet there is 1 problem so I just want to go through some lessons about their qualitative ways of looking at it so I want to look at the rest of the last 2 minutes so this is quite a common type of questions so please take time to practice this enduring discussion give lots of examples as well to practice so you the same concentrations of all of these substances are so now they're your has raised the following solutions in order of the most city to most basic a write to water rank use and so it would be a good idea to look at each 1 of these so we have KOH his Casey CN NH for CL and HCl arrived so let's look at this that's categorizes wasn't will this a strongly Will this be a strong acid Will this be a weak acid week based on their rank him 1st right now you take care 0 8 it's an ionic compounds it's Canada's Group 1 so you know the candidates could be neutral all right what is end minus is or to minus a strong winds or we'd be strong base right so that means this combination so you're looking at what happened the manner and so this combination will be a strong base now let's look at this 1 it's got K last arrived at all of these you know you can look at the results 1st and this is assault again potassium plus it's a neutral stop at a neutral can act as an accessory because it's group 1 mattered to seal minus the counter and seal minus is strong or weak it's a conjugate base of a strong acid but a country based on strong acid is was neutral so that is Kate Plus is neutral seal minuses neutral therefore this will be neutral states of each component this will be neutral this will be neutral and therefore this
compound as a whole would be neutral now let's turn to their deaths is neutral it's the cannot and it's a good point so it's us all the Catalans neutral because the good 1 medal now let's get the end and ITC and minus so they are not sure don't memorize doctors a new look at the table seen as a weak acid to see in mind is the conjugate base of a weak acid the kind base a weak acid is what Pacific of basic on neutral basic so that means that this is based said all right but it's a week Our right of the combined these what you end up with is a weak base right now we turn to the and invested by taking each for plus this would be a weak acid because it's the conjugate acid level we base said this would be a weak acid this is minus which is the conjugate base of a strong acid this will be neutral therefore the overall this will be a weak acid right now lastly it's CIA is an asset and this we know is whether this is a strong acid rain so let's writers from the strongest acid which is the strongest asset it's the Now let's look at this this is a weak acid we see neutral strong based on what comes next in for sale would come next this is the strongest acid next comes 1st which is a weak acid now we have a neutral on the basis of next comes whatever is neutral which is Casey so now we're switching from after 2 neutral 10 out bases would be the weak base would be Casey and and then the strongest base would be the awaits if you look at that as the
ranking list in terms of relative absence strands are a started with the strongest asset to the strongest
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