Unit Test Review Complete Study Guide Graded A+

Consider the following chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its dissociated aqueous solution. HC2H3O2(aq) mc012-1.jpg H+(aq) + C2H3O2-(aq) yellow blue What will be the color of the solution if a large amount of H2CO3 is added? {Ans: The solution will remain yellow.}Which is true about reaction rates? {Ans: Reaction rates are not related to spontaneity.}Which statement is usually true about the relationship between activation energy and reaction rates? {Ans: High activation energy barriers result in low rates.}Consider the chemical equation in equilibrium. A(g) + 2B(g) mc030-1.jpg C(g) + D(g) + heat What will happen to the equilibrium of this reaction if the temperature is increased? {Ans: It will shift to the left because heat is absorbed.}According to Le Chatelier's principle, a change in pressure affects the chemical equilibrium of the reaction system under what condition? {Ans: Some of the reactants or the products are in the gaseous phase.}Which statement best describes how dynamic equilibrium relates to a saturated solution of sodium chloride? {Ans: They oxidize hydrocarbons to form less toxic gases.}