To 50 g of a solution of calcium chloride with a mass fraction of 4%, 10 g of the same salt and 10 g of water were added.

To 50 g of a solution of calcium chloride with a mass fraction of 4%, 10 g of the same salt and 10 g of water were added. The mass fraction of salt in the resulting solution is equal to.

ω (X) = {m (solution) ω + m (salt)} / {m (solution) + m (water) + m (salt)}
ω = 50 * 0.04 + 10/50 + 10 + 10 = 0.17 or 17%

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