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Question

How many moles of sodium hydroxide can be added to 1L of a solution, 0.1M in NH3 and 0.1M in NH4Cl without changing the pOH by more than 2.00 unit? Assume no change in volume. Kb(NH3)=1.8×105.

A
0.0818
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B
0.818
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C
0.00818
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D
8.18
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