Factors Affecting Reaction Rate
Chemistry ⇒ Chemical Kinetics and Equilibrium
Factors Affecting Reaction Rate starts at 10 and continues till grade 12.
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See sample questions for grade 10
A reaction between two gases is carried out at high pressure. What effect does increasing the pressure have on the reaction rate?
A reaction between two solutions is found to be faster at higher concentrations. What does this suggest about the effect of concentration on reaction rate?
A reaction is carried out at 25°C and then at 35°C. What is the expected effect on the reaction rate?
A reaction is carried out in a closed container. If the pressure is doubled, what happens to the rate of a reaction between two gases?
A reaction is observed to proceed faster when the reactants are finely divided. What factor is being changed?
A student adds a catalyst to a reaction mixture. What effect will this have on the reaction rate?
Describe how increasing the surface area of a solid reactant affects the rate of reaction.
Describe one way to increase the rate of a reaction between two gases.
Describe the effect of a catalyst on the activation energy of a reaction.
Explain how temperature affects the rate of a chemical reaction.
Explain why increasing the concentration of reactants increases the rate of reaction.
Explain why powdered zinc reacts faster with hydrochloric acid than a lump of zinc.
Explain why reactions generally proceed faster at higher temperatures.
If the temperature of a reaction is decreased, what happens to the rate of reaction?
What is the effect of increasing the pressure on the rate of a reaction involving only solids?
A reaction between a solid and a gas is observed to proceed much faster when the solid is crushed into a fine powder. Explain, in terms of particle collisions, why this happens.
A reaction between two aqueous solutions is found to be much faster when the solutions are stirred. Explain how stirring affects the rate of reaction.
A student investigates the effect of light on the rate of a photochemical reaction. She finds that increasing the intensity of light increases the reaction rate. Explain why this occurs.
Consider the decomposition of hydrogen peroxide (H2O2) in the presence and absence of manganese dioxide (MnO2) as a catalyst. Describe how the presence of MnO2 affects the reaction rate and explain why.
Explain why the rate of a reaction typically decreases as the reaction proceeds, even if temperature and other conditions are kept constant.
