The mass fraction of sodium sulfate in a solution of 20 g of this salt of 80 g of water is equal to ..

univerkov | June 1, 2021 | education

To find the mass fraction, it is necessary to divide the mass of the solute by the mass of the entire solution.

m (solution) = m (Na2SO4) + m (H2O) = 20 + 80 = 100;

Find the mass fraction of sodium sulfate:

w (Na2SO4) = m (Na2SO4) / m (solution) = 20/100 = 0.2 = 20%.

Answer: w (Na2SO4) = 20%.

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