Chemical Equilibrium Quiz

What is the main characteristic of a chemical equilibrium?

• The reaction stops completely.

• The forward and reverse reactions occur at different rates.

• The concentrations of reactants and products remain constant.

• The reaction only proceeds in one direction.

In the Haber-Bosch process, what happens when equilibrium is reached?

• Only hydrogen is consumed.

• Only nitrogen is consumed.

• Ammonia formation and decomposition occur at the same rate.

• The reaction stops and no more ammonia is formed.

What does a large equilibrium constant (K > 1) indicate about a reaction?

• The reaction does not reach equilibrium.

• The reaction is product-favored.

• The reaction is reactant-favored.

• The reaction is very slow.

How is the equilibrium constant (K) expressed for a reaction?

• As the product of reactant concentrations.

• As the ratio of product concentrations to reactant concentrations, each raised to the power of their coefficients.

• As the difference between product and reactant concentrations.

• As the sum of reactant concentrations.

In the RICE method, what does the 'C' stand for?

• Coefficient

• Constant

• Change in molarity

• Concentration

When using the RICE method, why can solids be excluded from the equilibrium expression?

• Solids do not participate in reactions.

• Solids are always reactants.

• Solids have a constant activity of 1.

• Solids have no concentration.

In the carbon tetrachloride example, what is the initial molarity of CCl4?

• 0.88 M

• 0.2 M

• 0.176 M

• 1 M

What is the purpose of using a RICE table in equilibrium problems?

• To calculate the rate of reaction.

• To determine the initial concentrations only.

• To systematically organize and solve for equilibrium concentrations.

• To find the temperature of the reaction.

In the nitrogen dioxide dimerization example, what is the equilibrium constant (Kc) given?

• 0.95

• 4.7

• 0.2

• 1.6

Why is the negative value for X in the quadratic equation not valid in the nitrogen dioxide example?

• It suggests the reaction does not reach equilibrium.

• It results in a negative equilibrium constant.

• It makes the reaction rate negative.

• It implies a negative concentration, which is impossible.