Question

If you need a 2.5M solution of sodium hydroxide, what mass of sodium hydroxide must be dissolved in 600 mL of water?

Answer 1

M(NaOH) = 39.997 g/mol;

Proportion:

2.5 moles – 1000 mL

x moles – 600 mL

x = 1.5 moles;

m = n×M;

m(NaOH) = 1.5 moles × 39.997 g/mol = 59.995 g

Answer: 60 g