To 180 g of a 4% solution of potassium acetate was added 120 g of a 6% solution of the same salt. Mass fraction of salt in the resulting solution is equal to
| May 28, 2020 | Education
Determine the masses of substances in each solution
by the formula m of the substance = ω * m of the solution
m (substance 1) = 180 * 0.04 = 7.2 g
m (substance 2) = 120 * 0.06 = 7.2 g
m (substance 3) = 14.4 g
Determine the proportion of the resulting solution
ω = m (substance3) / m (solution3)
ω = 14.4 / (180 + 120) = 0.048 (4.8%)
Answer 4.8%
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