2006 (10-26) 1220-E2

2006 (10-26) 1220-E2 - CHEMISERY 1220 SECOND EXAM Show All...

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CHEMISERY 1220 SECOND EXAM Show All Work ! 26 October 2006 Name ______________________________ (3) Discussion Section # _________________ (3) Seat # ________________________ (20) 1. Let’s consider a titration of 100 mL of a 0.10 M aqueous solution of NH 3 by 0.10 M acetic acid (HOAc). Answers: ( a ) pH = __________ ; pOH = __________ ( b ) _____________ ( c ) _____________ ( a ) What is the pH prior to adding any HOAc? The pOH? ( b ) What is the pH at the equivalence (end) point ( c ) What is the limiting pH?
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(10) 2. ( a ) Suppose under some conditions that K w = 5.5·10 -14 . What would [H 3 O + ] and the pH be for a neutral solution? Answers: [H 3 O + ] = ____________________ pH = ____________________ ( b ) What might be done to pure water to cause such an increase in K w ? Answer: ______________________________________________________________ (10+5) 3. ( a ) What is K b for the HSO 3 - ion? Answer:
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This note was uploaded on 03/06/2011 for the course CHEM 1220 taught by Professor Thanhtruong during the Spring '09 term at Utah.

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2006 (10-26) 1220-E2 - CHEMISERY 1220 SECOND EXAM Show All...

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