Factors Affecting Reaction Rates

How does an increase in temperature affect the rate of a chemical reaction?

• An increase in temperature has no effect on the rate of a chemical reaction.

• An increase in temperature slows down the rate of a chemical reaction.

• An increase in temperature causes the chemical reaction to stop completely.

• An increase in temperature speeds up the rate of a chemical reaction.

Explain the relationship between concentration and reaction rate.

• An increase in concentration of reactants leads to a decrease in reaction rate.

• A decrease in concentration of reactants leads to an increase in reaction rate.

• The relationship between concentration and reaction rate is that an increase in concentration of reactants leads to an increase in reaction rate.

• Concentration has no impact on reaction rate.

Why does increasing the surface area of a reactant speed up a reaction?

• Surface area has no impact on the speed of a reaction

• Decreasing the surface area allows for more reactant molecules to be present in a smaller space

• Increasing surface area reduces the energy of collisions between reactant molecules

• Exposing more particles to potential collisions leads to more frequent and effective collisions between reactant molecules.

In what way does pressure impact the rate of a reaction?

• Pressure impacts the rate of a reaction by changing the color of the reactants.

• Pressure impacts the rate of a reaction by altering the chemical composition of the products.

• Pressure impacts the rate of a reaction by increasing the temperature of the system.

• Pressure impacts the rate of a reaction by affecting the frequency of collisions between reactant molecules.

What is the general effect of raising the temperature on reaction rates?

• Reaction rates decrease

• Reaction rates become unpredictable

• Reaction rates remain constant

• Reaction rates increase

Describe how concentration influences the speed of a reaction.

• Decreasing the concentration of reactants increases the speed of the reaction.

• Concentration has no effect on the speed of a reaction.

• Increasing the concentration of reactants leads to more collisions, increasing the speed of the reaction.

• Increasing the concentration of products decreases the speed of the reaction.

How does surface area affect the rate of a reaction?

• Surface area affects the rate of a reaction by decreasing the temperature of the reactants.

• Surface area affects the rate of a reaction by changing the color of the products.

• Surface area affects the rate of a reaction by increasing the frequency of collisions between reactant molecules.

• Surface area affects the rate of a reaction by altering the chemical composition of the reactants.

Why does pressure have an impact on reaction rates?

• Pressure changes the color of the reactants.

• Pressure affects the temperature of the reaction.

• Pressure alters the chemical composition of the reactants.

• Pressure changes the frequency of collisions between reactant molecules.

What happens to reaction rates when temperature is lowered?

• Reaction rates increase

• Reaction rates become faster

• Reaction rates decrease

• Reaction rates remain constant

Discuss the role of concentration in determining reaction rates.

• Concentration affects reaction rates by influencing the frequency of collisions between molecules.

• Higher concentration decreases the reaction rate

• Reaction rates are only determined by temperature, not concentration

• Concentration has no effect on reaction rates