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Elevation in boiling point of 0.25 M aq....

Elevation in boiling point of `0.25` M aq. Solution weak acid HX is `0.14` . What is molarity of of `H^(+)` solution ?
`HX_("aq") hArr H_("aq")^(+) + X_("aq")^(-)`
Given : `K_(b) (H_(2)O) = 0.5`
Molality = Molarity
[Give : Answer as `[H^(+)] xx 100]`

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