If the percentage purity of an impure sample | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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

Vedclass · Accepted Answer

More than the theoretical weight

Vedclass · Answer

(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:

Similar Questions

If the reduction of a sample of $Cu_2O$ yields $1.27 \, g$ of $Cu$,then how many grams of oxygen must be present in it?

$50 \ mL$ of $0.5 \ M$ oxalic acid is needed to neutralize $25 \ mL$ of sodium hydroxide solution. The amount in grams of $NaOH$ in $50 \ mL$ of the given sodium hydroxide solution is:

Hydrochloric acid solutions $A$ and $B$ have concentrations of $0.5 \,N$ and $0.1 \,N$ respectively. The volumes of solutions $A$ and $B$ required to make $2 \,L$ of $0.2 \,N$ hydrochloric acid are:

$A$ $100 \ mL$ solution of $CH_3CH_2MgBr$ on treatment with methanol produces $2.24 \ mL$ of a gas at $STP$. The weight of gas produced is $......mg$. [nearest integer]

In the following reaction sequence,the $\%$ yield for reaction $I$ is $60 \%$ and that of reaction $II$ is $50 \%$. The overall yield of the complete reaction is $..........\%$ [nearest integer].

Vedclass Test Series

Exam Paper Generator

Online Exam Module