Mixed 200 g of a sulfuric acid solution with a mass fraction of 20% and 300 g of a sulfuric acid solution with a mass fraction of 40%.

Mixed 200 g of a sulfuric acid solution with a mass fraction of 20% and 300 g of a sulfuric acid solution with a mass fraction of 40%. Mass fraction of acid in the resulting solution.

ω (X) = {m1 (p-p) ω1 + m2 (p-p) ω2} / {m1 (p-p) + m2 (p-p)}
ω = 200 * 0.2 + 300 * 0.4 / (200 + 300) = 40 + 120/500 = 0.32 or 32%

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