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Diborane, B(2) H(6), reacts with water t...

Diborane, `B_(2) H_(6)`, reacts with water to from boric acid and hydrogen , What is the `pH` of the solution which results when `1.104 g` of `B_(2)H_(6)` reacts with `100 mL` water ? Assume the final volume to be `100 mL`.
Given : `K_(a)` of `H_(3) BO_(3) = 8 xx 10^(-10) pK_(a)` , Atomic weight of `B = 10,8 g , MW` of `B_(2) H_(6) = 27.6 g mol^(-1)`.

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`4.6401`
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