For the estimation of nitrogen,1.4 g of an o | vedclass

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(B) The formula for the percentage of nitrogen is: $\% \ N = \frac{1.4 	imes 	ext{meq. of acid consumed}}{	ext{mass of organic compound}}$Step $1$:

Vedclass · Accepted Answer

$10$

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(B) The formula for the percentage of nitrogen is: $\% \ N = \frac{1.4 	imes 	ext{meq. of acid consumed}}{	ext{mass of organic compound}}$Step $1$: Calculate milliequivalents $(meq)$ of $H_2SO_4$ taken:$meq 	ext{ of } H_2SO_4 = 60 \ mL 	imes \frac{1}{10} \ M 	imes 2 	ext{ (basicity)} = 12 \ meq$Step $2$: Calculate $meq$ of $NaOH$ used for back titration:$meq 	ext{ of } NaOH = 20 \ mL 	imes \frac{1}{10} \ M 	imes 1 	ext{ (acidity)} = 2 \ meq$Step $3$: Calculate $meq$ of acid consumed by ammonia:$meq 	ext{ of acid consumed} = 12 - 2 = 10 \ meq$Step $4$: Calculate percentage of nitrogen:$\% \ N = \frac{1.4 	imes 10}{1.4} = 10 \%$

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