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View Attempt 2 of unlimited Title: Chapter 19(1) Started: November 8, 2009 6:55 PM Submitted: November 8, 2009 7:41 PM Time spent: 00:46:16 Total score: 8/12 = 66.67% Total score adjusted by 0.0 Maximum possible score: 12 1. Buffer Synthesis 5 Match the acid/base pair that is suitable for preparing a buffer of each given approximate concentration. You will need to refer to Tables in the book of weak acids and bases and polyprotic acid C 6 H 5 NH 2 / C 6 H 5 NH 3 Cl NaH 2 AsO 3 /Na 2 HAsO 3 NH 3 /NH 4 Cl [H 3 O + ] = 10 -4 [H 3 O + ] = 10 -9 [H 3 O + ] = 10 -7 Statement Response Value Correct Match C 6 H 5 NH 2 / C 6 H 5 NH 3 Cl [H 3 O + ] = 10 -7 Incorrect [H 3 O + ] = 10 -4 NaH 2 AsO 3 /Na 2 HAsO 3 [H 3 O + ] = 10 -4 Incorrect [H 3 O + ] = 10 -7 NH 3 /NH 4 Cl [H 3 O + ] = 10 -9 Correct [H 3 O + ] = 10 -9 Score: 0/1 2. Indicator 5 Which indicator would be the best to use for a titration between 0.10 M HF with 0.10 M NaOH? You will probably need to consult the appropriate table in the book.
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This note was uploaded on 02/17/2010 for the course CHEM 1332 taught by Professor Shiv during the Fall '08 term at University of Houston.

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