Ch. 5-3 pt. 2 Factors Affecting Rates of Reactions

The rate of a reaction increases as temperature__________________.

• Decreases
• Increases
• Stays the Same

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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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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

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

• larger
• smaller

Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.

• false
• true

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NGSS.HS-PS1-5

Usually lowering the temperature will slow down a reaction.

• false
• true

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NGSS.HS-PS1-5

A catalyst increases the efficiency of collisions between reactants.

• true
• false

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The glow stick glowed brighter in hot water because

• the chemical reaction slowed down in hot water

• the chemical reaction speed up in hot water

• temperature has no effect on the glow stick chemical reaction

• all of the above

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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

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NGSS.HS-PS1-5

Which would not speed up a chemical reaction?

• Using a large beaker

• Increasing the concentration

• Decreasing particle size

• adding a catalyst

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NGSS.HS-PS1-5