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What is the freezing point of a solution...

What is the freezing point of a solution containing `8.1g Br `in `100g` water assuming the acid to be `90%`ionised(`K_(f)`for water =`1.8K "mole"^(-1))`

Text Solution

Verified by Experts

`HBr to H^(+) + Br^(-)`
`i = 1-alpha+mx`
n=2
`i=1+alpha`
`DeltaT_(f) = iK_(f)m`
`DeltaT_(f) = (1-alpha)1.86 xx (8.1)/(81) xx (1000)/(100)`
`rArr DeltaT_(f) = (1+0.9) xx 1.86 xx (8.1)/(81) xx 10`
`DeltaT_(f) = 3.53`
`T_(f)^(@) = 0^(@)C`
`DeltaT_(f) = T_(f)^(@) - T_(f)`
`T_(f) = -3.534^(@)C`
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