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Question

The % of nitrogen is (as nearest integer) :
[Molar mass of (NH4)2C2O4=124.10 g/mol and atomic mass of N=14.0078]

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Solution

Meq. of (NH4)2C2O4 = Meq. of NH3 = Meq. of H2SO4 used
Meq. of NH3 =w124.102×1000
=(0.05305×2×5011.3×0.1214)
=3.633 g
w(NH4)2C2O4=0.2273 g
Percentage of (NH4)2C2O4=0.22730.4775×100 =47.6%
Also, meq. of N= meq. of NH3
w14×1000=3.663 or wN2=0.0513g
Percentage of N=0.05134.775×100=10.75%
So, the nearest integer is 11.

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