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During estimation of nitrogen present in...

During estimation of nitrogen present in an organic compound by Kjeldahl’s method, the ammonia evolved from `0.5` g of the compound in Kjeldahl’s estimation of nitrogen, neutralized `10` mL of `1` M `H_(2)SO_(4)`. Find out the percentage of nitrogen in the compound.

Text Solution

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`1` M of `10` mL `H_2 SO_4 = 1` M of `20` mL of `NH_3`
`1000` mL of `1` M ammonia contain `= 14` g nitrogen
`20` mL of `1` M ammonia contain `= (14 xx 20)/(1000)` g nitrogen
`therefore` Percentage of nitrogen `= (14 xx 20)/(1000 xx 0.5 ) xx 100= 56.0 %`
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