Answers

2016-04-11T05:00:44+05:30
Dibasic acid: H₂X, for example H₂SO₄, H₂S, H₂CO₃
H₂X + 2NaOH ---> Na₂X + 2H₂O
1 mol    2 mol           1 mol     2 mol
N/10 (?)   NaOH  =  0.1 mol/L ?
If so, it 100 ml NaOH 0.1 mol/L contains 0.01 mol NaOH and is neutralised with n = 0.5 * 0.01 = 0.005 mol acid.
And so the molar mass of acid:
M = m / n = 0.45 / 0.005 = 90 g/mol

 
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