Factors Affecting Reaction Rate

What is the main factor that affects the rate of reaction?

• Temperature

• Concentration

• Particle Size

• Catalyst

Why does an increase in temperature increase the rate of reaction?

• It increases the concentration of reactants

• It increases the activation energy

• It increases the surface area of particles

• It increases the kinetic energy of reactants

How does concentration affect the rate of reaction?

• Higher concentration leads to more collisions

• Lower concentration leads to more collisions

• Concentration has no effect on the rate of reaction

• Concentration only affects the activation energy

Why does particle size affect the rate of reaction?

• Smaller particles have higher activation energy

• Smaller particles have lower activation energy

• Smaller particles have larger surface area

• Smaller particles have smaller surface area

What is the role of a catalyst in a reaction?

• It increases the activation energy

• It decreases the concentration of reactants

• It increases the surface area of particles

• It speeds up the reaction without being used up

Which of the following is NOT a factor that affects the rate of reaction?

• Temperature

• Concentration

• Pressure

• Particle Size

What happens to the rate of reaction when the temperature is increased by 10°C?

• It doubles

• It triples

• It quadruples

• It remains the same

How does dissolving solid reactants affect the rate of reaction?

• It decreases the surface area

• It increases the surface area

• It decreases the concentration

• It increases the concentration

What is the main role of a catalyst in a reaction?

• To increase the concentration of reactants

• To decrease the activation energy

• To decrease the surface area of particles

• To increase the pressure of the system

Why do reactions in solid form have a different rate than those dissolved in an aqueous solution?

• Solid form reactions have higher activation energy

• Solid form reactions have lower activation energy

• Solid form reactions have lower concentration

• Solid form reactions have higher concentration