Calculate the mass of sodium sulphate require | vedclass

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Question

(B) Let the mass of sodium sulphate required be $x\,g$.The mass of the solution is the sum of the mass of the solute and the mass of the solvent (wate

Vedclass · Accepted Answer

$25$

Vedclass · Answer

(B) Let the mass of sodium sulphate required be $x\,g$.The mass of the solution is the sum of the mass of the solute and the mass of the solvent (water).Mass of solution $= (x + 100)\,g$.The formula for mass percentage is: $	ext{Mass percentage} = \frac{	ext{Mass of solute}}{	ext{Mass of solution}} 	imes 100$.Given that the mass percentage is $20\%$,we have:$20 = \frac{x}{x + 100} 	imes 100$.Dividing both sides by $20$:$1 = \frac{x}{x + 100} 	imes 5$.$x + 100 = 5x$.$4x = 100$.$x = 25\,g$.Therefore,the mass of sodium sulphate required is $25\,g$.

Calculate the mass of sodium sulphate required to prepare its $20\%$ (mass percent) solution in $100\,g$ of water. (in $,g$)

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