Rate Factors
Chemical Kinetics
Factors Affecting Reaction Rate
OVERVIEW
Chemical reactions occur at different rates. In this experiment you will consider some of the key factors that influence the rate of a reaction:
nature of reactants - particle size temperature concentration catalysts According to the collision theory, the rate of a reaction depends on the frequency of collisions between reacting particles. The more frequent the collisions, the faster the rate of the reaction. However, in order for the collisions to be effective, the particles must collide with sufficient energy (activation energy). Furthermore, the particles must collide with the proper orientation.
The factors that will be examined in this lab influence reaction rate by either increasing how often collisions occur or by making collisions more effective.
PURPOSE
To examine factors that increase reaction rate SAFETY
Portions of this lab may only be carried out under the supervision of a teacher Safety goggles must be worn when working with acids.
Factors Affecting Reaction Rate
EQUIPMENT AND MATERIALS
Part 1. Effect of Particle Size
solid zinc, approx. 0.5 cm × 2 cm, or solid marble chips zinc powder or calcium carbonate powder balance
2 test tubes
1M HCl (approx 10 mL per group)
Part 2. Effect of Temperature
3 Alka Seltzer tablets
3 250-mL beakers water at three temperatures – with ice, room temperature, warm
(around 70°C)
Part 3. Effect of Concentration
1M HCl, 5 mL per group
3M HCl, 5 mL per group
6M HCl, 5 mL per group
3 pieces of zinc metal, each approx
1 cm × 1 cm
3 test tubes
Part 4. Effect of a Catalyst
3% hydrogen peroxide, H2O2 – 10 mL per group
0.1 M iron(III) nitrate, Fe(NO3)3
0.1 M sodium chloride, NaCl
0.1 M calcium chloride, CaCl2
0.1 M potassium nitrate, KNO3
0.1 M manganese chloride, MnCl2
100-mL graduated cylinder
10-mL graduated cylinder
7 test tubes per group
1
PROCEDURES
Part 1. Effect of Particle Size on
Factors Affecting Reaction Rate
OVERVIEW
Chemical reactions occur at different rates. In this experiment you will consider some of the key factors that influence the rate of a reaction:
nature of reactants - particle size temperature concentration catalysts According to the collision theory, the rate of a reaction depends on the frequency of collisions between reacting particles. The more frequent the collisions, the faster the rate of the reaction. However, in order for the collisions to be effective, the particles must collide with sufficient energy (activation energy). Furthermore, the particles must collide with the proper orientation.
The factors that will be examined in this lab influence reaction rate by either increasing how often collisions occur or by making collisions more effective.
PURPOSE
To examine factors that increase reaction rate SAFETY
Portions of this lab may only be carried out under the supervision of a teacher Safety goggles must be worn when working with acids.
Factors Affecting Reaction Rate
EQUIPMENT AND MATERIALS
Part 1. Effect of Particle Size
solid zinc, approx. 0.5 cm × 2 cm, or solid marble chips zinc powder or calcium carbonate powder balance
2 test tubes
1M HCl (approx 10 mL per group)
Part 2. Effect of Temperature
3 Alka Seltzer tablets
3 250-mL beakers water at three temperatures – with ice, room temperature, warm
(around 70°C)
Part 3. Effect of Concentration
1M HCl, 5 mL per group
3M HCl, 5 mL per group
6M HCl, 5 mL per group
3 pieces of zinc metal, each approx
1 cm × 1 cm
3 test tubes
Part 4. Effect of a Catalyst
3% hydrogen peroxide, H2O2 – 10 mL per group
0.1 M iron(III) nitrate, Fe(NO3)3
0.1 M sodium chloride, NaCl
0.1 M calcium chloride, CaCl2
0.1 M potassium nitrate, KNO3
0.1 M manganese chloride, MnCl2
100-mL graduated cylinder
10-mL graduated cylinder
7 test tubes per group
1
PROCEDURES
Part 1. Effect of Particle Size on