Rates of Reactions

Front

What is the effect of adding a catalyst on activation energy?

Back

Adding a catalyst lowers the activation energy required for a reaction.

Front

How does increasing surface area affect the rate of reaction?

Back

Increasing surface area increases the number of collisions among particles, thus speeding up the reaction.

Front

Does increasing the concentration of reactants slow down the reaction?

Back

No, increasing the concentration of reactants speeds up the reaction.

Front

What will NOT speed up the reaction between magnesium and hydrochloric acid?

Back

Tightly coiling up the strip of magnesium will NOT speed up the reaction.

Front

What letter represents the activation energy in a reaction diagram?

Back

The letter A represents the activation energy.

Front

Define activation energy.

Back

Activation energy is the minimum energy required for a chemical reaction to occur.

Front

What is a catalyst?

Back

A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.

Front

Explain how temperature affects reaction rates.

Back

Increasing the temperature generally increases the reaction rate by providing more energy to the reactants, leading to more frequent and effective collisions.

Front

What is the relationship between reaction rate and concentration?

Back

Generally, increasing the concentration of reactants increases the reaction rate.

Front

What is the role of surface area in chemical reactions?

Back

Greater surface area allows more particles to collide, increasing the rate of reaction.