Determine the solubility of potassium sulfate at 80 * s from the graph. Calculate the mass fraction of salt in the saturated solution at the indicated temperature.
t = 80
1) At this temperature, 20 g of potassium sulfate dissolves in 100 g of water, therefore the mass of the solution is 100 + 20 = 120 g.
2) w% = 20/120 * 100 = 16.7%
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