Unit 14

Question 1

Which of the following occurs when a reaction in a solution is at equilibrium and more product is added to the solution?

a. Equilibrium shifts to produce more product
b. Equilibrium shifts to produce more reactant
c. No change will occur
d. The reaction will stop

Answer 1

B.

Question 2

In the reaction H2 (g) + I2 (g) ® 2HI (g), which change would cause the greatest increase in the concentration of the products?

a. decrease the concentration of H2
b. decrease the concentration of I2
c. increase the concentration of H2
d. increase the concentration of HI

Answer 2

A.

Question 3

NO2 and N2O4 undergo the reaction shown. When a sealed container of reaches chemical equilibrium, which must be true?

a. NO2 is present.
b. No chemical reactions are occurring.
c. The maximum number of molecules has been reached.
d. The rates of the forward and reverse reactions are equal.

Answer 3

D.

Question 4

In the reaction 2SO2(g) + O2 yields 2SO3(g), which change would cause the greatest increase in the concentration of SO3?

a. Decrease the concentration of SO2
b. Decrease the concentration of O2
c. Increase the concentration of SO2
d. Increase the concentration of O2

Answer 4

C.

Question 5

AgCl(s)  yields Ag+(aq) + Cl-(aq) + heat
In the above reaction, the addition of silver chloride, a very soluble salt will cause-
a. the Keq value to decrease
b. the reaction to shift right
c. the concentration of AgCl to decrease
d. none of the above

Answer 5

B.