All of the water in a 0.20 M solution of NaCIwas evaporated and 0.150

1.	All of the water in a 0.20 M solution of NaCIwas evaporated and 0.150 mol of NaCI wasobtained. What was the original volume ofthe sample?(A) 30 mL(C) 750 mlL(B) 333 mL(D) 1000 mL
Answer» molarity= no.of moles of solute/volume of the solution in litres. given that:molarity=0.20 ,no.of moles of solute =0.15. so, 0.20=0.15/volume of the solution. volume=0.15/0.20=0.75 lt. so volume=750ml.

All of the water in a 0.20 M solution of NaCIwas evaporated and 0.150 mol of NaCI wasobtained. What was the original volume ofthe sample?(A) 30 mL(C) 750 mlL(B) 333 mL(D) 1000 mL

Answer»

molarity= no.of moles of solute/volume of the solution in litres.

given that:molarity=0.20 ,no.of moles of solute =0.15.

so, 0.20=0.15/volume of the solution.

volume=0.15/0.20=0.75 lt.

so volume=750ml.