Question

what is the mass fraction of a solute in a solution containing containing 150g of potassium bromide in 385 ml of water​

Answer 1

fraction of solute in solution is 0.28(approx)

solution containing 150g of potassium bromide in 385 ml or 385 cm³ of water.

we know, density of water = 1 g/cm³

so, mass of water = volume of water × density of water

= 385 cm³ × 1g/cm³ = 385g

here, mass of potassium bromide is less than mass of water in the solution so potassium bromide is solute and water is solvent.

now, mass of solute = 150g

mass of solution = mass of solute + mass of solvent = 150 + 385 = 535g

so, fraction of solute in solution = mass of solute/mass of solution

= 150g/535g

≈ 0.28

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