Honors Chemistry

Chapter 18 Study Guide

Can you:

· State what it means for a chemical reaction to be in a state of chemical equilibrium?

· Explain how you would know whether a reaction had reached equilibrium?

· Give the conditions under which a chemical reaction can reach equilibrium?

· Explain how a chemical reaction reaches equilibrium starting with all reactants and no products?

· State the properties that a reaction at equilibrium has?

· Predict the results of changes made to a reaction at equilibrium, including changes in concentration of reactants or products, changes in temperature or pressure, or the addition of a catalyst (i.e. Le Chatelier’s Principle)?

· Write the equilibrium constant expression given the balanced chemical equation?

· Explain what the value of the equilibrium constant tells us about the reaction?

· State the factors that affect the value of the equilibrium constant?

· Determine the value of the equilibrium constant given the equation, initial amounts of reactants and the amount of product present at equilibrium?

· Write the balanced chemical equation and the K_a expression for the dissociation of an acid.

· Find the pH of a solution of a weak acid given the K_a value and the concentration?

· Find the value of K_a for a weak acid given the concentration of a solution of this acid and its pH?

· Write the balanced chemical equation and the K_sp expression for the dissolving of an ionic compound in water to product a saturated solution?

· Find the solubility of an ionic compound given the K_sp, or the value of K_sp given the solubility?

· Use K_a and K_sp to solve problems involving a buffer solution or the common ion effect, similar to those done on the worksheets?

· Explain how we were able to determine the value of the equilibrium constant in the lab activity, and do calculations similar to those in the lab activity?