Factors That Affect the Rates of Reactions

The minimum amount of energy needed for colliding particles to react is called

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

Which factors increase the rate of a reaction.

• increasing temperature

• increasing concentration

• increasing surface area

• all of these

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Which factors affect the rate of a reaction?

• temperature

• concentration

• surface area

• pressure

• catalyst

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Increase in temperature of the reactants can do one of the following

• Slow collision frequency

• Allow less effective collision between the particles

• Cause particles to lose speed

• Increase collision between the particles thus increasing the rate.

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Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration

• surface area

• temperature

• reactants

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of particle collisions

• it increases the frequency of particle collisions because there are more collision sites

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How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by giving them more energy

• by making them more available

A substance that increases speed of chemical reaction without being being changed is called:

• Catalyst

• Acid

• Base

• pressure

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This slows down or even stops a chemical reaction.

• de-activator

• catalyst

• enzyme

• inhibitor

What is the effect of increasing the concentration of reactants on the rate of reaction?

• It decreases the rate of reaction

• It has no effect on the rate of reaction

• It increases the rate of reaction

• It changes the state of reactants

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