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Calculate the percentage of boron (B) in...

Calculate the percentage of boron (B) in borax, `Na_(2)B_(4)O_(7). 10H_(2)O`.
(H = 1, B = 11, O = 16, Na = 23)

Text Solution

Verified by Experts

Molecular mass of `Na_(2)B_(4)O_(7).10H_(2)O`
`=2xx23+4xx11+7xx16+10(2+16)`
`=46+44+112+180=382`
`therefore` % age of B in `Na_(2)B_(4)O_(7).10H_(2)O=44/382xx100`
`=(22xx100)/191=11.518%`
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