Calculate the masses of salt and water required to prepare 400 g of a solution with a salt fraction of 0.05.
| February 17, 2021 | education
The mass fraction of a substance in a solution is determined by the formula.
W = m (substance): m (solution) × 100%,
hence m (substance) = (m (solution) × w): 100%.
m (substance) = (400 g × 5%): 100% = 20 g.
m (water) = m (solution) – m (salt).
m (water) = 400 g – 20 g = 380 g.
Answer: 20 g; 380 BC
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