Ionic EquilibriumHard
Question
1.4 g of an organic compound was digested according to Kjeldahl′s method and the ammonia evolved was absorbed in 60 mL of M/10 H2SO4 solution. The excess sulphuric acid required 20 mL of M/10 NaOH solution for neutralization. The percentage of nitrogen in the compound is :
Options
A.24
B.5
C.10
D.3
Solution
Organic compound → NH3
(1.4g)
2NH3 + H2SO4 → (NH4)2SO4
H2SO4 + 2NaOH → Na2SO4 + 2H2O
nNH3 + 20 ×
nNH3 =
nN = nNH3 = 0.01 ⇒ mN = 0.01 × 14 = 0.14 ⇒ % of N =
× 100 = 10%
(1.4g)
2NH3 + H2SO4 → (NH4)2SO4
H2SO4 + 2NaOH → Na2SO4 + 2H2O
nNH3 + 20 ×
nNH3 =
nN = nNH3 = 0.01 ⇒ mN = 0.01 × 14 = 0.14 ⇒ % of N =
× 100 = 10%Create a free account to view solution
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