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Define molar elevation constant....

Define molar elevation constant.

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`(K_b)` It is defined as the elevation in the boiling point for 1 molal solution.
We know `DeltaT_b prop m`
`DeltaT_b = K_b m rarr` molality
If m = 1 and `DeltaT_b = 1`
Then `K_b =1 `
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