AP and IBSL Kinetic PreLab Quiz

Which of the following is the theory that states that atoms, molecules, and ions must collide for a chemical reaction to occur?

• mechanism
• accident theory
• reaction theory
• collision theory

How much time has passed when 5 mol/L have reacted at an average rate of 0.5 mol/L·s?

• 10 s
• 100 s
• 5 s
• 1 s
• 0.1 s

When the concentration of a reactant is increased, the

• reaction slows down
• reaction stops
• reaction speeds up
• reaction rate does not change

When you increase the temperature of a chemical reaction, the ____________.

• reaction slows down
• reaction stops
• reaction speeds up
• reaction rate does not change

What happens to the activation energy of the reaction when a catalyst is present?

• The activation energy does not change.
• The activation energy increases
• The activation energy decreases.
• The reaction stops.

Automobiles use a catalytic converter made of metal to ensure complete combustion of gasoline. What type of catalyst is present in automobiles?

• homogeneous catalyst
• heterogeneous catalyst
• solid-state catalyst
• ephemiral catalyst

What might an inhibitor do in a chemical reaction?

• speed up the reaction
• drive the reaction to completion
• raise the activation energy
• lower the activation energy

The rate law for the reaction between nitrogen monoxide and hydrogen is

Rate = k[NO2]^2[H2].

What happens to the rate if the concentration of nitrogen doubles?

• The rate doubles.

• The rate triples.

• The rate quadruples.

• The rate is reduced by half

The exponents in a rate-law expression define the __________, which describes how the rate is affected by the concentration of the reactant.

• instantaneous rate

• concentration

• specific rate constant

• reaction order

What is the overall reaction order for the following rate-law expression?

Rate = k[A][B]^2[C]^3

• 4

• 5

• 6

• 7