Chemical Kinetics

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

An addition of a catalyst to the following reaction would have what effect?

• A would be increased

• B would be increased

• C would be decreased

• No change

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NGSS.HS-PS1-5

NGSS.HS-PS1-4

Which of the following is NOT a factor affecting reaction rate?

• temperature

• catalysts

• particle size

• polarity

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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

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

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

When the reaction is directly proportional to the product of the concentration raised to the first power, it is the ____________.

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NGSS.HS-PS1-5