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Q.

What is the Kb of a weak base that produces one OH- per molecule if a 0.050 M solution is 2.5% ionized?

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a

3.2 X 10-5

b

1.6 X 10-6

c

1.2 X 10-3

d

7.8 X 10-8

answer is C.

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Detailed Solution

Here, we have,

kb=cα2

⇒Kb=50×10−3×2.5×2.5104

=50×6.25×10−7=325100×10−7×100

kb=3.2 X 10-5

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