Question

Calculate the concentration in mol dm^3 of the following solutions:
i) Solution of NaOH containing 2.0 g of NaOH in 50 cm^3 of solution
ii) A solution of ethanoic acid, HC2H3O2 containing 12.0 grams of ethanoic acid in 250 cm^3 of solution.

Answer 1

i)
(2.0 g NaOH) / (39.99715 g NaOH/mol) / (0.050 L) = 1.0 mol/L NaOH
ii)
(12.0 g HC2H3O2) / (60.0520 g HC2H3O2/mol) / (0.250 L) =
0.799 mol/L HC2H3O2