SampleExam3

SampleExam3 - Name (print) Chemistry 142 Exam #3 SAMPLE FOR...

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Name (print) Chemistry 142 Exam #3 SAMPLE FOR FULL CREDIT ON CALCULATIONS YOU MUST SHOW ALL WORK ! GOOD LUCK! (16) 1. Balance the following equations (will be graded as all right or all wrong): (a) NO 2 (aq) + Al (s) NH 3 (aq) + Al(OH) 4 (aq) (basic conditions) (b) Mn 2+ (aq) + NaBiO 3 (s) Bi 3+ (aq) + MnO 4 (aq) (acidic conditions) (6) 2. Answer the following questions: What is oxidized in problem 1(a)? What is the oxidant in problem 1(b)?
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(16) 3. (a) The solubility of LaF 3 is 9.28 x 10 –6 M . What is the K sp for LaF 3 in pure water? answer (b) How would the molar solubility of LaF 3 change for the following solutions compared to that in pure water (circle one for each solution)? acidic solution: increases decreases remains unchanged 0.1 M NaF solution: increases decreases remains unchanged 0.1 M NaCl solution: increases decreases remains unchanged (15) 4. Indicate the coordination number and oxidation state for the metal center in each of the following complexes (en = H
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This note was uploaded on 02/09/2010 for the course CH CH242 taught by Professor Katz during the Spring '10 term at Colby.

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SampleExam3 - Name (print) Chemistry 142 Exam #3 SAMPLE FOR...

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