# Worksheet: Calculating Reaction Quotients from Concentrations

Q1:

At , nitrogen and hydrogen react to form ammonia according to the equation: An equilibrium mixture of at was found to contain 1.35 M, 1.15 M, and M Given that the concentrations of all species are 1.00 M under standard conditions, calculate the equilibrium constant for this reaction.

• A16.7
• B0.265
• C3.77
• D
• E

Q2:

A reaction is represented by this equation: Which of the following is the correct expression for the equilibrium constant?

• A
• B
• C
• D
• E

Q3:

Water gas, a mixture of and , is an important industrial fuel produced by the reaction of steam with red hot coke, which is essentially pure carbon:

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

• A =
• B =
• C =
• D =
• E =

Q4:

A 0.72 mol sample of is heated in a 1.00 L vessel. At equilibrium, the vessel contains 0.40 mol of and 0.40 mol of . If the concentrations of all species are 1.00 M under standard conditions, calculate the equilibrium constant, , for the decomposition of to and at this temperature.

Q5:

Water gas is a mixture of carbon monoxide and hydrogen gas and is called water gas because it is formed from steam and hot carbon in the following reaction:

Methanol, a liquid fuel that could possibly replace gasoline, can be prepared from water gas and hydrogen at high temperature and pressure in the presence of a suitable catalyst according to the equation

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

• A =
• B =
• C =
• D =
• E =