AP Chemistry Rate Law

Which step of a reaction mechanism determines the rate?

• the slow step

• the fast step

• the first step

• the second step

Tags

NGSS.HS-PS1-5

What is the unit for the rate constant (k) for 2^nd order reactions?

• s^-1

• M/s

• M^-1s^-1

Tags

NGSS.HS-PS1-5

What is the rate law for the reaction with this slow elementary step? A --> B + C

• rate = k[A]²

• rate = k[B]²

• rate = k[A][B]

• rate = k[A]

Tags

NGSS.HS-PS1-5

A possible rate law for a third overall order of a reaction is __________________

• Rate = k [A]²[B]²

• Rate = k [A][B]³

• Rate = k [A]³ [B]

• Rate = k [A]²[B]

Tags

NGSS.HS-PS1-5

As concentration increases, reaction rate .......

• Increases

• decreases

Tags

NGSS.HS-PS1-5

The rate of a chemical reaction is NOT affected by which of the following:

• temperature

• concentration

• particle size (surface area)

• All of these affect reaction rates

Tags

NGSS.HS-PS1-5

Which change increases the rate of a chemical reaction?

• Increasing the size of solid reactant particles

• Decreasing the concentration of aqueous reactants

• Increasing the surface area of a solid reactant

• Decreasing the pressure of gaseous reactants

Tags

NGSS.HS-PS1-5

Which factors increase the rate of a reaction.

• increasing temperature

• increasing concentration

• increasing surface area

• all of these

Tags

NGSS.HS-PS1-5

Which of the following is true about reaction rates?

• increase as temperature decreases

• decrease when a catalyst is added

• increase as surface area increases

• decreases as reactant concentration increases

Tags

NGSS.HS-PS1-5

In general, if the temperature of a chemical reaction is increased, the reaction rate

• increases

• decreases

• remains the same

• cannot be predicted

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6