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09.10.2019 •
Chemistry
Calculate the mass percent (m/m) of a solution prepared by dissolving 59.56 g of nacl in 165.1 g of h2o. express your answer to four significant figures.
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Ответ:
% m/m = [grams of solute] / [grams of solution] * 100
And grams of solution = grams of solute + grams of solvent.
So, in our problem:
Solute = NaCl => mass of solute = 59.56 g
Solvent = H2O => mass of solvent = 165.1 g
=> mass of solution = 59.56 g + 165.1 g = 224.66 g
=> % m/m = [59.56 / 224.66] * 100 = 26.51 g (using four significant figures).
26.51%
Ответ: