To 60 g of a solution with a mass fraction of a solute of 10% was added 40 g

To 60 g of a solution with a mass fraction of a solute of 10% was added 40 g of water. determine the mass fraction of the solute in the resulting solution

Given:
m1 solution (in-va) = 60 g
ω1 (in-va) = 10%
m (H2O) = 40 g

To find:
ω2 (in-va) -?

Solution:
1) Calculate the mass of the solute:
m (in-va) = ω1 (in-va) * m1 solution (in-va) / 100% = 10% * 60/100% = 6 g;
2) Calculate the mass of the final solution:
m2 solution (in-va) = m1 solution (in-va) + m (H2O) = 60 + 40 = 100 g;
3) Calculate the mass fraction of the solute in the resulting solution:
ω2 (in-va) = m (in-va) * 100% / m2 solution (in-va) = 6 * 100% / 100 = 6%.

Answer: The mass fraction of the solute in the resulting solution is 6%.