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Question

The pH of a 0.1 M NH4OH solution0.1 M is equal to:

[Given that : Kb=105]

A
10
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B
6
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C
11
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D
12
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Solution

The correct option is B 11
NH4OHNH+4+OH

For a weak base,

Concentration of [OH]=Cα=C×Kb=0.1×105=103M

So,

pOH=log[OH]=3

pH=14pOH=11

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