Question

Which of the following mixtures of water and H2SO4 would have mass percentage of H2SO4 close to 30?

(A) 30 g H2SO4 + 100 g H2O

(B) 1 mol of H2SO4 + 2 mol of H2O

(C) 1 mol of H2SO4 + 200g of H2O

(D) 0.30 mol H2SO4 + 0.70 mol H2O

Answer 1

Correct answer is (C) 1 mol of H2SO4 + 200g of H2O

Mass percentage of H2SO4 = 98/298 x 100 = 32.88

Closest to 30.