For preparing a 0.1 , N solution of a compoun | vedclass

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(B) The sample contains impurities. The impurity does not contribute to the normality of the solution. To obtain the required amount of pure compound,

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More than the theoretical weight

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(B) The sample contains impurities. The impurity does not contribute to the normality of the solution. To obtain the required amount of pure compound,we must account for the percentage purity. Since the sample is not $100 \%$ pure,we need to take a larger mass of the impure sample compared to the theoretical weight of the pure compound to ensure the actual amount of the active substance matches the requirement. Therefore,the weight of the substance required will be more than the theoretical weight.

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

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