products rotate the plane of polarization. The measurements are carried out in the sodium lamp, a polarizer, a cuvette, and an analyzer. A few through the eyepiece of the polarimeter

usually shows one or two black bars in the non-adjusted state. To adjust, rotate the dial of the polarimeter until the bars disappear and only a uniform gray circle remains. Here's the setup of the experiment. Two thermostats, one set to 30 degrees celsius for the

second set to 70 degrees celsius to complete the reaction, a glass cuvette, and the polarimeter. Prepare both a sugar solution and diluted hydrochloric acid into beakers. 25 grams of sucrose and 75 grams of water are mixed to form the sugar solution in beaker 1.

Prepare 40 milliliters of a 3 molar hydrochloric acid into beaker 2. Thermostat both solutions to 30 degrees celsius. Start the reaction by adding the acid to the

sugar solution and start the clock. Rinse and fill the cuvette with the reacting solution, making sure there are no more air bubbles in the cuvette. Insert the cuvette into the

polarimeter. Record both the angle of rotation and temperature of the reacting solution every two minutes for a period of 60 minutes. To measure a completely reactant solution, thermostat 100 milliliters of the original reaction mixture to 70 degrees celsius for 15

minutes. Do not exceed 15 minutes for not to caramelize the sugar solution. Allow the reacted solution to cool on the table to 30 degrees celsius, rinse and fill the cuvette with it, again mind the air bubbles, and measure the angle of rotation 10 times. More information about the experiment and especially its evaluation

can be found in the textbook and in the handout. Good luck in the lab and thanks for watching!