Acids and Bases Quiz 1

Acids and Bases Quiz 1 - ] = 1 x 10-8 , [H 3 O + ] = 1 x...

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CHEM 120 Chapter 8 Acids and Bases Practice Quiz 1 Name ________________________________ (2pts) 1. What is strong acid? Give two examples. A strong acid is one which dissociated almost completely. Example H 2 SO 4 , HNO 3 , HCl, HBr, HI, HClO 4 (1pt) 2. What is the meaning and value of K w ? Kw is the product of the acid and base concentration. Its value is 1 x 10 -14 Kw = [H 3 O + ] [OH - ] = 1 x 10 -14 (1pt) 3. If you know the [OH - ], how can you determine the pH of a solution? [H 3 O + ] [OH - ] = 1 x 10 -14 If you know [OH - ], you can get [H 3 O + ] then take the absolute value of the exponent of [H 3 O + ], that is the pH Example; If [OH -
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Unformatted text preview: ] = 1 x 10-8 , [H 3 O + ] = 1 x 10-6 , pH = 6 (2pts) 4. Determine the [H 3 O + ] for a solution with pH = 12.0. 1 x 10-12 (2pts) 5. What is a buffer? Give an example. A buffer is a solution that resists a change in the pH of the solution. A buffer could be made in any of the following two ways 1. Add a weak acid to the salt of the weak acid example: HC 2 H 3 O 2 + NaC 2 H 3 O 2 or 2. . Add a weak base to the salt of the weak base example: NH 4 OH + NH 4 Cl (2 pts) 6. Balance the following neutralization reaction: H 2 SO 4 (aq) + 2 KOH (aq) à K 2 SO 4 + 2 H 2 O...
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This test prep was uploaded on 04/10/2008 for the course CHEM 231 taught by Professor Hanover during the Spring '08 term at Lansing.

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Acids and Bases Quiz 1 - ] = 1 x 10-8 , [H 3 O + ] = 1 x...

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