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The boiling point of water at 750mm Hg ...

The boiling point of water at `750mm Hg` is `99.63^(@)C`. How much sucrose is to be added to `500 g` of water such that it boils at `100^(@)C`.

Text Solution

Verified by Experts

`Delta T_(b) = 100 - 99.63 = 0.37^(@)`
`M_(B) = (K_(b) xx 100 xx w_(B))/(w_(A) xx Delta T_(b))`
`342 = (0.522 xx 1000 xx w_(B))/(500 xx 0.37)`
`w_(B) = (342 xx 500 xx 0.37)/(0.522 xx 1000) = 121.7 g`
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