CH 102 Mock EXAM 3 Spring 2006

CH 102 Mock EXAM 3 Spring 2006 - CH 102 Mock EXAM 3 Spring...

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Saturated Solution Solution I Solution II Solution III CH 102 Mock EXAM 3 Spring 2006 1. In the reaction: CaO(s) + CO 2 (g) → CaCO 3 (s) A. Ca 2+ acts as a Lewis acid and CO 3 2- acts as a Lewis base. B. O 2- acts as a Lewis base and CO 2 acts as a Lewis acid. C. O 2- acts as a Lewis base and Ca 2+ acts as a Lewis acid. D. CaO is the Lewis acid and CaCO 3 is its conjugate base. E. CO 2 is the Lewis acid and CaCO 3 is its conjugate base. 2. Aqueous solutions of which of the following salts will give the most basic solution? A. NaOCl C. NaClO 2 B. NaCl D. NaClO 3 3. Which of the following salt solutions is basic? A. Na 2 CO 3 C. CaBr 2 B. NH 4 Cl D. K 2 SO 4 4. Lewis acids A. always increase the concentration of hydrogen ions in an aqueous solution. B. are always proton donors. C. can attach to a lone pair of electrons to form a covalent bond. D. must have a lone pair of electrons. 5. What is the pH of a solution which is 0.0100 M in HA (a weak acid) and also 0.0020 M in NaA (K a = 9.0 x 10 -6 )? A. 2.40 C. 4.35 B. 5.65 D. 6.65 6. Which of the following is the most effective buffer for a pH value of 7.45? A. H 2 CO 3 and HCO 3 - , K a = 4.4 x 10 -7 B. HCO 3 - and CO 3 2- , K a = 4.7 x 10 -11 C. H 2 S and HS - , K a = 1.0 x 10 -7 D. H 2 PO 4 - and HPO 4 2- , K a = 6.3 x 10 -8 7. A 0.1 M solution of HCl is used to titrate a 25-mL sample of a 0.1 M solution of ammonia, K b = 1.8 x 10 -5 . At the equivalence point, the pH is approximately A. 1 C. 7 B. 5 D. 11 8 ForAg 2 CO 3 , K sp = 8 x 10 -12 . What is Ag + concentration in a Ag 2 CO 3 solution that is 0.010 M in CO 3 2- ? A. 2 x 10 -9 M C. 6 x 10 -5 M B. 3 x 10 -5 M D. 8 x 10 -4 M 9. In an aqueous solution which is 0.1 M sodium acetate, the concentration of hydronium ions [H 3 O + ] is A. less than the [H 3 O + ] in 0.1M acetic acid. B. equal to the [H 3 O + ] in 0.1M acetic acid. C. greater than the [H 3 O + ] in 0.1M acetic acid. D. impossible to compare with the [H 3 O + ] in 0.1M acetic acid 10. The pictures below represent solutions of Ba(OH) 2 , in which Ba 2+ is represented by grey spheres and OH - is represented by black spheres. The solutions may also contain other ions that are not shown. The first solution is
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This note was uploaded on 04/08/2008 for the course CHEM 102 taught by Professor ?? during the Spring '08 term at Clemson.

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CH 102 Mock EXAM 3 Spring 2006 - CH 102 Mock EXAM 3 Spring...

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