Chemical Reactions and Factors Affecting Reaction Rate

4 factors that affects reaction rate.

• temperature

• surface area

• presence of catalyst

• Chemical nature of reactant

• In solid form

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NGSS.HS-PS1-5

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

• increased concentration of reactants

• increased surface area

• increased speed of particles.

• better orientation of reactants

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NGSS.HS-PS1-5

Reaction rate means...

• amount of product formed

• speed of reaction

• concentration of reacting particles

• combining reactants with products

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NGSS.HS-PS1-5

To slow down a chemical reaction you will do one of the following:

• Place the reactants in hot water

• Place the products in ice bath

• Place the reactants in a ice bath

• Keep stirring the reactants with a stirring rod

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NGSS.HS-PS1-5

What letter represents the activation energy?

• A

• B

• C

• D

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NGSS.HS-PS1-4

Usually lowering the temperature will slow down a reaction.

• false

• true

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NGSS.HS-PS1-5

Catalysts permit reactions to happen with a __________ activiation energy.

• lower

• higher

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NGSS.HS-PS1-5

What type of reaction is this?

• Endothermic

• Exothermic

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NGSS.HS-PS1-4

Based on the collision model, the atoms in the top of potential energy ‘’hill’’ are called

• Top of hill

• Activation energy

• Transition state

• Steric factor

An endothermic reaction with high activation energy for the forward reaction is given by the diagram.

• A

• B

• C

• D

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NGSS.HS-PS1-4