Reaction rate means...

• amount of product formed
• speed of reaction
• concentration of reacting particles
• combining reactants with products

Tags

NGSS.HS-PS1-5

Consider the following rate law: Rate = k[A]ⁿ[B]^m
How are the exponents n and m determined?

• by using balanced chemical equation
• By using the subscripts for the formulas
• By educated guess
• By experiment 

Tags

NGSS.HS-PS1-5

Which one of the following is a first order, overall reaction

• k₁= 1.000 M s^-1
• k₁= 5403.2 M^½ s^½
• k₁= 1.23 x 10^-6 M^-1 s^-1
• k₁= 10.7 s^-1

Tags

NGSS.HS-PS1-5

• IO^-, because it was used as a reactant in an earlier step and reproduced in a subsequent step
• I^-, because it was used as a reactant in an earlier step and reproduced in a subsequent step
• IO^-, because it was produced in an earlier step and used up in a subsequent step
• I^-, because it was produced in an earlier step and used up in a subsequent step

Tags

NGSS.HS-PS1-2

• rate = k[CO]²[O₂]²

• rate = k[CO]²[O₂]

• rate = k[CO][O₂]²

• rate = k[CO][O₂]^1/2

Tags

NGSS.HS-PS1-5

A catalyst:

• should be eliminated when we solve elementary reaction steps of a proposed reaction mechanism simultaneously
• should always be introduced and eliminated in the first elementary step of a proposed reaction mechanism
• lowers the amount of energy released by an exothermic reaction
• lowers the amount of energy added to a reaction 

Tags

NGSS.HS-PS1-4

Increasing temperature of a chemical reaction:

• increases the number of collisions per second of chemical reactants
• increases the speed of reaction
• can increase the pressure of reactants
• all of the above

Tags

NGSS.HS-PS1-5

The graph shown depicts the relationship between concentration and time. What is the slope of this line?

• -k

• -1/k

• k

• ln[A]o

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 is the rate law for this mechanism?

• rate = k[A][B]²

• rate = [B][X]

• rate = [A]^0.5[B]^1.5

• rate = [W][Y][Z]

Tags

NGSS.HS-PS1-5