Calculate the mass of salt remaining when water is evaporated from a solution weighing 150 g
| August 9, 2021 | education
Calculate the mass of salt remaining when water is evaporated from a solution weighing 150 g, in which the mass fraction of salt is 5%.
To determine the mass of a substance in a solution, we will use the formula to determine the mass fraction of a substance:
W (in-va) = m (in-va) / m (solution) • 100%.
m (in-va) = W (in-va) • m (solution) / 100%.
m (NaCl) = 5 * 150/100% = 7.5 g.
Evaporated water mass:
m (H2O) = m (solution) – m (in-va) = 150 – 7.5 = 142.5 g.
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