Reaction Rates Review

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

• concentration
• surface area
• temperature
• reactants

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NGSS.HS-PS1-5

Which factors increase the rate of a reaction.

• increasing temperature
• increasing concentration
• increasing surface area
• all of these

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NGSS.HS-PS1-5

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions
• it only increases the frequency of particle collisions
• it only increases the energy of particle collisions
• it reduces the activation energy of the reaction

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NGSS.HS-PS1-5

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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NGSS.HS-PS1-5

Products will form faster if____________

• the particle size of the reactants are larger.
• temperature is decreased.
• concentration of the reactants are increased.
• the reaction is not stirred.

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In a chemical reaction, how quickly or slowly reactants turn

into products is called the

• Catalyst

• Reaction Rate

• Concentration

• Temperature

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What is the name given to a catalyst in the human body?

• Enzyme

• Enzyme

• Enzyme

• Enzyme

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst
• product
• reactant
• solute

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NGSS.HS-PS1-5

If the reactant particles collide with less energy than the activation energy, the particles will be rebound, and no reaction will occur.

• True

• False

The collisions which bring about a chemical reaction are called:

• Consistent collisions

• Normal collisions

• Effective collisions

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NGSS.HS-PS1-5