Question

A solution of hydrogen peroxide is 15.2% by mass. What is the molarity of the solution? Assume that the solution has a density of 1.01 g.mL-1.

Answer 1

Answer:

4.60 moles / l

Explanation:

1 litre of solution will have a mass of 1010 g if the density of the solution is 1.01 g/l

1010 g of solution will contain 1010 x 15.2/100 g of H2O2 =156.55 g

So the molarity calculation:

H =1, O=16

H2O2 = 2+32=34

Molar mass is 34 g

156.55/34 = 4.60 moles /l