Answer to Question #160649 in Chemistry for Dexther Villanueva

Question

30.00g of K2SO4 is dissolved in 200g of water. The percent by weight of K2SO4 in the solution is

A. 60.00%

B. 13.04%

C. 15.00%

D. none of the given answers

E. 30.00%

Answer 1

Solution:

Percent by weight of solute = (gram of solute / gram of solution) × 100%

Mass of solute (K₂SO₄) = 30 g

Mass of solvent (H₂O) = 200 g

Mass of solution = Mass of solute (K₂SO₄) + Mass of solvent (H₂O)

Mass of solution = 30 g + 200 g = 230 g

Hence,

Mass % of K₂SO₄ in this solution = (30 g / 230 g) × 100% = 13.04%

The percent by weight of K₂SO₄ in the solution is 13.04%.

Answer: B. 13.04%.