Reaction Rates and Collision Theory

In which experiment is the rate of reaction between hydrochloric acid and calcium carbonate slowest? 

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

The major theory of reaction rate is called

• Collision theory

• Crash theory

• Newton's laws

• Thermodynamics

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NGSS.HS-PS1-5

What letter represents the activation energy?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

What is the energy of the activated complex?

• 75 kJ

• 225 kJ

• 300 kJ

• 225 kJ

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NGSS.HS-PS1-4

Activation energy is required to start a chemical reaction. What is activation energy?

• The energy needed for a reaction to occur

• The minimum amount of energy needed for a reaction to potentially occur

• The energy added by a catalyst

• The energy possessed by the products

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

• concentration

• surface area

• temperature

• reactants

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

• larger

• smaller

Increasing the concentration of the reactants will slow down the reaction.

• false 

• true

Tags

NGSS.HS-PS1-5

Explosions can happen when there is a large amount of powdered substance because of a large

• temperature

• surface area

• concentration

• pressure

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NGSS.HS-PS1-5

When we investigate the rate of reaction we are looking at the...

• amount of product formed

• speed of reaction

• concentration of reacting particles

• combining reactants with products

Tags

NGSS.HS-PS1-5