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Q.

A solution consists of 0.2 M NH4OH  and 0.2 MNH4Cl . If Kb  of NH4OH  is 1.8×10−5 , the [OH−] of the resulting solution is

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a

0.9×10−5 M

b

1.8×10−5 M

c

3.2×10−5 M

d

3.6×10−5 M

answer is B.

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Detailed Solution

POH=PKb+log[S][B]=PKb [OH−]=Kb=1.8×10−5
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