Calculate the mass percent (m/m) for the solute in each of the following solutions.

Question

a) 61 g of NaOH in 329 g of NaOH solution

b) 3.5 g of KOH and 30.5 g of H2O

c) 50.5 g of Na2CO3 in 253.0 g of Na2CO3 solution

Answer 1

a) 61 g / 329 g (x100) = 19% (m/m)

b) 3.5 g / 3.5 g + 30.5 g (x100) = 3.5 g/34 g (x100) = 10.% (m/m)

c) 50.5 g / 253 g (x100) = 20.0% (m/m)