If the percentage purity of an impure sample | vedclass

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(A) The theoretical weight $(W_{th})$ is calculated based on the assumption that the substance is $100\%$ pure. Since the sample is impure,its purity

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More than the theoretical weight

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(A) The theoretical weight $(W_{th})$ is calculated based on the assumption that the substance is $100\%$ pure. Since the sample is impure,its purity is less than $100\%$. To obtain the required amount of the pure substance,we must take a larger quantity of the impure sample. Therefore,the actual weight required $(W_{act})$ is calculated as $W_{act} = \frac{W_{th} 	imes 100}{	ext{Percentage Purity}}$. Since the percentage purity is less than $100$,$W_{act}$ will be greater than $W_{th}$.

If the percentage purity of an impure sample of a compound is given,then the weight of the substance required to prepare its $0.1 \, N$ solution will be:

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