CHEM2320 Final

CHEM2320 Final - F 2006 Final...

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Unformatted text preview: F 2006 Final Name___________________________ 1. Balance the following redox reactions. a) H 2 O 2 + Cl- - Cl 2 + O 2 acidic b) CrI 3 + H 2 O 2 - CrO 4 2- + IO 4- basic c) Fe +2 + Cr 2 O 7-2 -- Fe +3 + Cr +3 acidic 2. What weight of KMnO 4 (158 g/mole)2 is in 450ml of 0.115 M solution? 3. Sulfurous acid has the following equilibria. H 2 SO 3 <-> H + + HSO 3- Ka1 = 1.23 x 10-2 HSO 3- <-> H + + SO 2 2- Ka2 = 6.6 x 10-8 C alculate the pH of the following solutions. a) 0.02 M H 2 SO 3 b) 0.05 M HSO 3- c) 0.03 M Na 2 SO 3 4. Consider a buffer solution of 0.025 M benzoic acid and 0.035 M sodium benzoate. HB <-> H + + B- K a = 6.8 x 10-5 a) What is the pH of the buffer solution? b) What is the pH of the solution if 15 ml of 0.02 M HCl is added to 100 ml of b) What is the pH of the solution if 15 ml of 0....
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This note was uploaded on 04/29/2008 for the course CHEM 2320 taught by Professor Altmiller during the Fall '07 term at St. Edwards.

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CHEM2320 Final - F 2006 Final...

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