In 160 g of water, 40 g of salt was dissolved. The mass fraction of the solution is …
| February 1, 2021 | education
Given:
m (H2O) = 160 g;
m (salt) = 40 g.
To find:
W =?
Decision:
1) To determine the mass fraction, we use the formula:
W = (m (substance): m (solution)) x 100%.
2) m (solution) = m (solvent) + m (solute);
m (solution) = 160 g + 40 g = 200 g.
3) Substitute the values:
W = (40g: 200g) x 100% = 20%.
Answer: A) 20%.
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