Redox and Equivalent ConceptHard
Question
29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahl′s method and the evolved ammonia was absorbed in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. The percentage of nitrogen in the compound is
Options
A.59.0
B.47.4
C.23.7
D.29.5
Solution
Moles of HCl reacting with
ammonia = (moles of HCl absorbed ) - (moles of NaOH solution required)
= (20 × 0.1 × 10-3) - (15 × 0.1 × 10-3)
= moles of NH3 evolved.
= moles of nitrogen in organic compound]
∴ wt. of nitrogen in org. comp = 0.5 × 10-3 × 14
= 7 × 10-3 g
% wt =
= 23.7 %
ammonia = (moles of HCl absorbed ) - (moles of NaOH solution required)
= (20 × 0.1 × 10-3) - (15 × 0.1 × 10-3)
= moles of NH3 evolved.
= moles of nitrogen in organic compound]
∴ wt. of nitrogen in org. comp = 0.5 × 10-3 × 14
= 7 × 10-3 g
% wt =
= 23.7 %Create a free account to view solution
View Solution FreeMore Redox and Equivalent Concept Questions
The normality of 0.3 M phosphorous acid (H3PO3) is :...1 g of the carbonate of a metal was dissolved in 25 mL of 1N-HCl. The resulting liquid required 5 mL of 1N-NaOH for natu...Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some ...An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely...Which Mendelism idea is depicted by a cross in whichthe F1 generation resembles both the parents ?...