Question

calculate the mass of solutr sodium sulphate required to prepare it's 10% solution in 45kg of water (solvent)​

Answer 1

Answer:  Mass of the solution = mass of solute + mass of solvent

Given that the mass percent of sodium sulphate solution is 10%.

Let the mass of sodium sulphate which is required to prepare this solution be x grams.

Given that the mass of water is 45 kg

So,

10 = [x/(x + 100)] * 45

10/100 = [x/x + 100]

1/10 = x/x + 100

x + 100/5 = x

x + 100 = 5x

5x - x = 100

4x = 100

x = 100/4

x = 25

Thus, 25g of sodium sulphate is required