To 250 g of a 6% potassium chloride solution was added 50 g of water. Mass fraction of potassium chloride in the resulting solution.

univerkov | November 27, 2020 | education

1) we find the mass of a substance in a solution, for this we need 250 g x 0.06 = 15 g (the formula has the form m (substance) = m (solution) x ω / 100%
2) ω = mv-va / mr-ra x 100%
mr-ra = 250g + 50g = 300g
ω = 15g / 300g x 100% = 5%
Answer: 5%

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