AP Chem 5.7 Quiz

Which of the following is not a rule for finding the overall reaction of a reaction mechanism?

• Add identical species on the same side of equation steps

• Remove all intermediates

• Include catalysts

• Cancel identical species on opposite sides of equation steps

In a reaction mechanism, where do catalysts appear?

• As reactants in the first step and products in the last step

• Only in the final step

• As products in the first step and reactants in the last step

• Only in the intermediate steps

How would a catalyst affect the diagram below?

• The hill would be smaller.

• The activation energy live would shift to the right.

• The activiation energy line would shift to the left.

• Nothing would change.

• NO

• O₃

• NO₂

• O

• NO and O₃

• O and O₃

• NO₂ and O₂

• NO₂ and O

• NO and O

What did the chemist have with her eggs? Hint: Focus on the element symbols

• oxygen (O), lithium (Li) and silver (Ag)

• barium (Ba), cobalt (Co) and nitrogen (N)

Tags

NGSS.MS-PS1-1

Which of the following statements is true about intermediates in a reaction mechanism?

• They are always present in the final product

• They appear as products in the overall reaction

• They are consumed in the first step and regenerated in the last step

• They are formed in one step and consumed in a subsequent step

In a multi-step reaction mechanism, what is the rate-determining step?

• The step with the highest activation energy

• The step with the lowest activation energy

• The first step of the mechanism

• The last step of the mechanism

Tags

NGSS.HS-PS1-5

What is the role of a catalyst in a reaction mechanism?

• To increase the activation energy of the reaction

• To decrease the activation energy of the reaction

• To change the overall enthalpy of the reaction

• To become part of the final product

X + 2 Y → Z + 3 Q

For the reaction represented above, the initial rate of decrease in [X] was 2.8 × 10^-3 mol L^-1 s^-1. What was the initial rate of decrease in [Y] ?

• 7.0 × 10^-4 mol L^-1 s^-1

• 1.4 × 10^-3 mol L^-1 s^-1

• 2.8 × 10^-3 mol L^-1 s^-1

• 5.6 × 10^-3 mol L^-1 s^-1

Tags

NGSS.HS-PS1-5