35 g of water was added to 80 g of a 5% salt solution. What was the mass fraction of the new solution?
| December 9, 2020 | education
Let’s find the mass of a substance by the formula
m = m (solution) * w (solution)
m = 80 * 5/100 = 0.4g
Find the mass of the solution
m1 (solution) = m (solution) + m (H2O)
m1 (solution) = 80 + 35 = 115g
w1 = m (in-general) / m1 (solution)
w1 = 0.4 / 115 * 100% = 0.34%
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