Experiment 10 Molecular Weight Determination by Freezing Point Depression
A. The Freezing Point of cyclohexane
1. Get a short, wide test tube, a one-hole stopper, and a inch stirring bar from the
2. Need a Vernier Lab Pro, a temperature probe,
Spectrophotometric Determination of Food Dyes
1. Each group member will choose one of the solutions to prepare.
2. To calibrate the Spec20, first, with the sample compartment empty, set the needle to zero using the ZERO
Experiment 12 Chemical Kinetics
Part I Effect of Variation of the concentration of the reactants on the rate.
1. Carry out the three experiments by mixing the specified volumes of solutions of
potassium permanganate and oxalic acid of known concentrations
Experiment 14 Kinetics of a Chemical Reaction
1. Place 8 six-inch test tubes in a rack.
2. Using a stock solution containing 5.00 X 10^-4 M of iodine in a 0.002 M I2, prepare a
series of solutions containing various concentrations of
Experiment 11 Enthalpy of Hydration
1. Obtain 2 calorimeter cups and 2 clips.
2. Weigh calorimeter cups on analytical balance
3. Record mass of calorimeter.
4. Weigh beakers.
5. Obtain correct amounts of one anhydrous (MgSO4) sample and two hydrate
Experiment 13 Acid Dissociation Constant
1. Obtain an unknown acid from the stockroom and weigh out about 0.1g into a
clean 250 ml Erlenmeyer flask.
2. Add enough water to dissolve the acid and then add 3 drops of phenolphthalein
3. Rinse a cle
Experiment 17 Buffer Solutions
1. Set up the Vernier apparatus.
2. Obtain 250ml of the HC2H3O2 solution and 200ml of the NaC2H3O2 solution
using separate 400ml beakers.
3. Record the exact molar concentrations of the solutions.