Rate Constant Chemistry

A reaction has the rate law: Rate = k [A][B].
What is the order of reaction with respect to A?

• 1st
• 2nd
• 3rd
• 4th

A reaction has the rate law: Rate = k [A][B].
What is the overall order of reaction?

• 1st
• 2nd
• 3rd
• 4th

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

Write the rate law for the reaction aA → bB if the reaction is third order in A. [B] is not part of the rate law.

• Rate =k[A]
• Rate =3[A]
• Rate =k[3A]
• Rate =k[A]³

Tags

NGSS.HS-PS1-5

A reaction has the rate law: Rate = k [A][B].
What will happen to the rate of reaction if the concentration of A is doubled and the concentration of B is tripled?

• increases by a factor of 3
• increases by a factor of 4
• increases by a factor of 5
• increases by a factor of 6

Tags

NGSS.HS-PS1-5

The rate law for the reaction 2NO_(g) + O_2(g) → 2NO_2(g) is first order in O₂ and third order overall. What is the rate law for the reaction?

• Rate = k [NO]²[O₂]²
• Rate = k [NO]¹[O₂]²
• Rate = k [NO]²[O₂]¹
• Rate = k [2NO]²[O₂]¹

Tags

NGSS.HS-PS1-5

What is the rate of reaction?

• How fast a reaction is 
• How big a reaction is
• How loud a reaction is
• How much gas a reaction produces

Tags

NGSS.HS-PS1-5

The rate law of any chemical reaction 

• must be determined experimentally
• can be deduced based on the stoichiometry of the reaction
• changes based on the condition of the experiment
• I don't know

Tags

NGSS.HS-PS1-5

The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

• Red, because the activation energy is larger
• Blue, because the activation energy is lower
• both reaction progress at the same rate

Tags

NGSS.HS-PS1-4

The overall order of a reaction is 2. The units of the rate constant for the reaction are __________. 

• M/s
• M^-s^-
• s-
• M^-2s^-

Tags

NGSS.HS-PS1-5