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Chem 2 MIDTERM 2 Form C Fall 09

Chem 2 MIDTERM 2 Form C Fall 09 - Midterm 2 Exam Form C...

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Midterm 2 Exam Form C, CHEM 002 Fall 2009. (Chapters 7, 8, 9 and 10) Name: _________________________ Date: ____________ Please be sure the chemical equation(s) given in the question(s) below are balanced before you attempt to answer the respective question(s). 1. What is the pH of a saturated solution of Ca(OH) 2 , which has a K sp = 4.68x10 -6 . a) 1.68 b) 12.32 c) 5.63 d) 8.37 e) 11.52 2. Consider two compounds A 2 B and AB, both having the same K sp numeric value at 25 ° C, will they have the same solubility with all else being equal? a) Yes b) No c) Not enough information given to answer. 3. Consider solutions of a weak acid HA. If the initial concentration of HA is decreased, what happens to the percent ionization of the acid at constant temperature? a) Increases b) Decreases c) Not enough information given to answer. 4. If a chemical reaction is said to be endothermic, what is the relationship between the potential energy of the reactants and the products?
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