Answer to Question #164587 in General Chemistry for v

Question #164587

If you needed to collect 263 g of NaCl salt by evaporating off the water from a 4.2% by mass solution of NaCl salt water, how many grams of the solution do you need to evaporate the water off of?




1
Expert's answer
2021-02-18T07:46:39-0500

We have given,


Mass of "\\text{NaCl}=236g"

Mass percent"=4.2" %


Let the mass of solution be "x"

We know,


Mass%="\\dfrac{(\\text{Mass of NaCl)}}{\\text{(Mass of solution)}}\\times 100"


"4.2=\\dfrac{(263\\times 100)}{x}"


"\\implies x=\\dfrac{26300}{4.2}\\\\\\implies\n\nx=6261.90g"


Hence, "6261.90g" of solution we need to evaporate the water off. 


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