3.1 g of Na oxide was dissolved in 150 g of water. Determine the mass fraction in the resulting solution.

univerkov | December 10, 2020 | education

sodium oxide – Na2O
n (Na2O) = 3.1 / 62 = 0.05 mol
Na2O + H2O = 2NaOH
m (NaOH) = 0.05 * 2 * 40 = 4 g
mass fraction of NaOH = 4/150 + 3.1 = 0.026
answer 2.6%

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