Chemical Kinetics

Which of the following plots will show a linear relationship for a second order reaction?

• [A] vs time

• ¹/_[A] vs time

• ln[A] vs time

• [A]² vs time

The iodide ion reacts with hypochlorite ion in the following way:

OCl^- + I^- ⟶ OI^- + Cl^-.

This rapid reaction gives the rate data shown. What is the rate law?

• rate = [OCl^-]²[I^-]

• rate = [OCl^-][I^-]²

• rate = [OCl^-][I^-]

• rate = [OCl^-]

Tags

NGSS.HS-PS1-5

The following data were measured for the reaction

BF₃(g) + NH_3(g) ⟶ F₃BNH_3(g)

What is the rate law for the reaction?

• rate = k[NH₃]

• rate = k[BF₃]²[NH₃]

• rate = k[BF₃][NH₃]

• rate = k[BF₃][NH₃]²

Tags

NGSS.HS-PS1-5

The following data were measured for the reaction

BF_3(g) + NH_3(g) ⟶ F₃BNH_3(g)

What is the rate when [BF₃] = 0.100 M and [NH₃] = 0.500 M ?

• .01704 M/s

• .0852 M/s

• .1704 M/s

• .852 M/s

Tags

NGSS.HS-PS1-5

A reaction is found to be second order with respect to carbon monoxide. If the concentration of carbon monoxide is doubled, the rate of reaction __________.

• doubles

• remains unchanged

• increases by a factor of 4

• is reduced by a factor of 2

Tags

NGSS.HS-PS1-5

What letter represents the activation energy?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

Given the following rate law,

rate = k[A]²[B]

if [A] were doubled, what must happen to [B] to keep the rate constant?

• [B] must quadruple

• [B] must double

• [B] must be havled

• [B] must be quartered

Which of the following best describes why increasing temperature increase reaction rate?

• Activation energy is reduced.

• Collisions become more frequent.

• Collisions become more energetic.

• Collisions become more frequent and more energetic.

Tags

NGSS.HS-PS1-5

rate = k[A]

The rate constant in the rate law above is 0.5 L/mol·s. If the initial concentration of A is 0.1 M, how long will it take for [A] to drop to 0.025 M?

• 0.7 s

• 1.4 s

• 2.8 s

• There is not enough information given.

Tags

NGSS.HS-PS1-5

Which species is the catalyst in this reaction mechanism?

• R

• W

• X

• There is no catalyst.