post-lab 9 ch 204 - obennoskey(blo242 – Post-lab 9 –...

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Unformatted text preview: obennoskey (blo242) – Post-lab 9 – Lyon – (52635) 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Calculate the pH of a 0.180 M benzoic acid so- lution, C 6 H 5 COOH. The K a for C 6 H 5 COOH is 6.46 × 10- 5 . 002 10.0 points Calculate the pH of a 0.180 M benzoic acid solution after 200.0 ml of 0.450 M sodium benzoate, C 6 H 5 COONa, is added to 600.0 ml of C 6 H 5 COOH. 003 10.0 points The pH of a solution of hypochlorous acid, HClO, was measured to be 3.89. Calculate the molarity of this solution. The K a for HClO is 3.0 × 10- 8 . Answer in units of M. 004 10.0 points A solution made by mixing 45.0 ml of 0.360 M propionic acid, CH 3 CH 2 COOH, and 10.0 ml of 1.40 M sodium propionate, CH 3 CH 2 COONa, has a pH of 3.81. Calculate the corresponding value of K a for propionic acid....
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This note was uploaded on 04/14/2010 for the course CH CH302 taught by Professor Mccord during the Spring '10 term at University of Texas at Dallas, Richardson.

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post-lab 9 ch 204 - obennoskey(blo242 – Post-lab 9 –...

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