Some Basic Concepts Of Chemistry Question 172
Question: 1.25 g of a solid dibasic acid is completely neutralised by 25 ml of 0.25 molar $ Ba{{(OH)}_2} $ solution. Molecular mass of the acid is
Options:
A) 100
B) 150
C) 120
D) 200
Show Answer
Answer:
Correct Answer: D
Solution:
Molarity $ =\frac{W(gm)\times 1000}{V(ml)\times \text{molecular weight}} $
$ 0.25=\frac{1.25\times 1000}{25\times \text{molecular weight}} $
$ \therefore $ Molecular weight $ =\frac{1.25\times 1000}{0.25\times 25}=200 $ .
