Heath's Lab 18b

Miss Tomlinson                                EXPERIMENT 18B                                Feb. 17, 2017
Kaede Kawano                                 The Iodine Clock Reaction                                   Block C

Objectives:

1. To observe and record the effect of changing the concentration of a reactant on the rate of a reaction
2. To observe and record the effect of changing the temperature of a system on the rate of a reaction
3. To observe and record the effect of the nature of the reactants on the rate of a reaction
4. To observe and record the effect of a catalyst on the rate of a reaction

Materials:

Apparatus                                        Reagents
2 Beakers (100mL)                                Solution A: 0.02M KIO3 (potassium iodate)        
2 graduated cylinders (10mL)                        Solution B: 0.002M NaHSO3 (sodium bisulfite)
10 test tubes (18mm x 150mm)                        (also containing 4g of starch and 12mL of 1M H2SO4/L)
thermometer                                        0.02M KMnO4 (potassium permanganate)
4 beakers (250mL)                                0.1M FeSO4 (Iron(II)sulfate)
2 medicine droppers                                0.1M Na2C2O4 (sodium oxalate)
ice                                                0.1M MnSO4 (manganese(II)sulfate)
6 test tubes (13mm x 100mm)                        1M H2SO4
lab apron
safety goggles

Procedure:

Refer to pages 197-203 in Heath Chemistry Laboratory Experiments, Canadian Edition

Diagram:

n/a

Data and Observations:

Part 1: Effect of Concentration

Part 2: Effect of Temperature

Part 3: Effect of the Nature of the Reactants

Part 4: Effect of a Catalyst