# Worksheet: Concentration Changes in Equilibria

In this worksheet, we will practice calculating changes in the concentrations of reactants and products due to shifts in the position of equilibrium.

Q1:

Consider the following equilibrium.

Which of the following is the correct expression for the equilibrium constant () of the reaction?

• A
• B
• C
• D
• E

How must the concentration of change to reach equilibrium if the reaction quotient is less than the equilibrium constant?

• AIncrease
• BDecrease
• CStay the same

If the reaction were at equilibrium, how would a decrease in pressure (from an increase in the volume of the reaction vessel) change the pressure of ?

• AStay the same
• BDecrease
• CIncrease

If the change in the pressure of is 28 torr as a mixture of the four gases reaches equilibrium, how much would the pressure of have changed?

Q2:

A suspension contains solid in equilibrium with dissolved and ions. If solid is added to the suspension, which of the following effects is not observed?

• A decreases.
• B decreases.
• CThe pH increases.
• D increases.
• EThe amount of solid increases.