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Q.

At certain temperature H⊕ ion concentration of pure water is 5×10−7. The ionic product of water at this temperature is ………. moles2lit−2

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a

1×10−14

b

5×10−14

c

2.5×10−10

d

2.5×10−13

answer is B.

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Detailed Solution

In pure water  [H+]=[OH−]=5×10−7

∴  Kw  of this temperature =[H+][OH−]=[5×10−7]2

=25×10−14=2.5×10−13  moles2lit−2

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