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Question

50 ml H2O is added to a 50 ml solution of Ba(OH)2 of strength 0.01 M. The pH of the resulting solution will be____

A
8
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B
10
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C
12
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D
6
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Solution

The correct option is C 12
0.01 M Ba(OH)2=0.02 N Ba(OH)2

N1V1=N2V2

[0.02 N]×[50 ml]=N2×100 ml

N2=0.02×50100=102N;[OH]=102N

pOH=2 or pH=12
Option C is correct.

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