72 g of salt was dissolved in 18 g of water. Determine the mass fraction of salt in the resulting solution.
| February 24, 2021 | education
1) find the mass of the salt solution:
m solution (salt) = m (salt) + m solution (H2O) = 18 + 72 = 90 g
2) find the mass fraction of salt in the solution:
ω (salt) = m (salt) * 100% / m solution (salt) = 18 * 100% / 90 = 20%
Answer: the mass fraction of salt in the resulting solution is 20%.
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