Question

find the masses of NaCl and water required to bring 175g of a 15% solution

Answer 1

Answer:

mass percent = (grams solute / grams solution) x 100

15% = (x grams sodium chloride / 175 g total) x 100

Solving for x will give you the amount of NaCl:

x = 15 x 175 / 100

x = 26.25 grams NaCl

So, now you know how much salt is needed. The solution consists of the sum of the amount of salt and water. Simply subtract the mass of salt from the solution to obtain the mass of water that is required:

mass of water = total mass - mass of salt

mass of water = 175 g - 26.25 g

mass of water = 147.75 g

HOPE IT HELPS !!!!