Question

For preparing $0.1N$ solution of a compound from its impure sample of which the percentage purity is known, the weight of the substance required will be :

• A. less than the theoretical weight
• B. more than the theoretical weight
• C. same as the theoretical weight
• D. none of these

Answer 1

The correct option is B more than the theoretical weight

The sample contains impurity. The impurity won't contribute to the normality of the solution. So, we need to take more amount of sample than the theoretical weight so that the theoretical weight of compound equals weight of compound in the sample.

So, option B is correct.