To 300 g of a solution of potassium nitrate with a mass fraction of 20% was added 100 g of the same salt
| May 28, 2020 | Education
To 300 g of a solution of potassium nitrate with a mass fraction of 20% was added 100 g of the same salt. The mass fraction of potassium nitrate in the resulting solution will be
ω = m (substance) / m (solution) (1)
Find the mass of the substance from the first solution m (substance) = m (solution) * ω
m (substance) = 300g * 0.2 = 60g
Find the mass of the substance in the resulting solution
m (substances) = 60+ 100 = 160g
Find the mass of the solution m = 300 + 100 = 400g
Substitute the values in the formula (1) ω = 0.4 (40%)
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