Determine the mass fraction of a solute in a solution obtained by mixing 45 grams of water and 5 grams of salt.
| April 20, 2021 | education
Determine the mass fraction of a solute in a solution obtained by mixing 45 grams of water and 5 grams of salt.
The mass fraction of a substance is determined by the formula.
We know the mass of water and the mass of matter (salt).
We can find the mass of the solution by the formula:
m (solution) = m (substance) + m (water).
m (solution) = 45 g + 5 g = 50 g.
W = m (substance): m (solution) × 100%,
W = (5g: 50g) × 100% = 10%.
Answer: the mass fraction of the substance is 10%.
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