Equilibrium Constants and ICE Tables

This video tutorial covers ACS practice problems for General Chemistry 2, focusing on chemical equilibrium. It explains the concept of chemical equilibrium, how to write Kc and Kp expressions, and how to calculate the Kc value using an ICE table. The tutorial also includes practice problems and graph analysis to determine equilibrium constants.

Which statement best describes chemical equilibrium?

• The concentrations of reactants and products are equal.

• The velocities of reactant and product molecules are the same.

• The frequency of collisions between reactants and products is identical.

• Reactants form products at the same rate as products form reactants.

What is the first step in writing a Kc expression for a reaction?

• Identify the coefficients of reactants and products.

• Calculate the concentration of each reactant and product.

• Balance the chemical equation.

• Determine the physical states of reactants and products.

In a Kc expression, what role do the coefficients of reactants and products play?

• They are added to the concentration values.

• They become exponents in the expression.

• They are subtracted from the concentration values.

• They are ignored in the expression.

How does a Kp expression differ from a Kc expression?

• Kp uses pressure terms, while Kc uses concentration terms.

• Kp uses concentration brackets, while Kc uses pressure.

• Kp and Kc are identical in formulation.

• Kp is used for solids and liquids, while Kc is for gases.

When writing a Kp expression, what should you do with coefficients?

• Ignore them completely.

• Convert them into exponents.

• Use them as coefficients in the expression.

• Add them to the pressure values.

What is the first step in solving for an equilibrium constant using an ICE table?

• Write the balanced chemical equation.

• Calculate the initial concentrations.

• Identify the physical states of reactants and products.

• Determine the change in concentration.

In an ICE table, what does the 'C' stand for?

• Coefficient

• Concentration

• Constant

• Change

How do you determine the change in concentration in an ICE table?

• By using the initial concentration values.

• By using the rate of reaction.

• By using the equilibrium concentration values.

• By using the stoichiometric coefficients.

What is the final step in calculating the equilibrium constant from an ICE table?

• Multiply the equilibrium concentrations by the stoichiometric coefficients.

• Add the initial and equilibrium concentrations.

• Subtract the initial concentrations from the equilibrium concentrations.

• Divide the product concentrations by the reactant concentrations.

What is the significance of a 1-liter container in equilibrium calculations?

• It affects the physical states of reactants.

• It changes the equilibrium constant value.

• It increases the reaction rate.

• It simplifies the conversion to molarity.