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Find the percentage mass of water in was...

Find the percentage mass of water in washing soda crystals `Na_2CO_3 , 10H_2O.

Text Solution

Verified by Experts

Molecular mass of `Na_(2)CO_(3).10H_(2)O `
`= 2 xx 23 + 12 + 3 xx 16 + 10 (2 xx 1 + 16) `
`=46+12+48+180`
`=286amu.`
`therefore` Percentage of water of crystallisation in `Na_(2)CO_(3).10H_(2)O`
`=(180)/(286)xx100=62.9%`
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