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Question

What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?

A
7.0
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B
1.04
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C
12.65
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D
2.0
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Solution

The correct option is C 12.65
N1V1N2V2= equivalents of unreacted hydroxyl ions.

0.1×10.01×1=[OH]
[OH]=NR=0.092=0.045 N

pOH=log(0.045)=1.35

pH=14pOH=141.35=12.65

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