Mixed 150 g of a solution of potassium nitrate with a mass fraction of 12% and 200 g of a solution of the same salt with a mass fraction of 11%

Mixed 150 g of a solution of potassium nitrate with a mass fraction of 12% and 200 g of a solution of the same salt with a mass fraction of 11%. The mass fraction of salt in the resulting solution is equal to.

ω (X) = {m1 (p-p) ω1 + m2 (p-p) ω2} / {m1 (p-p) + m2 (p-p)}
ω = 150 * 0.12 + 200 * 0.11 / (150 + 200) = 18 + 22/350 = 0.114 or 11.4%

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