25 cm³ of 0.04 MNaOH completely neutralizes 24 cm³ of sulphuric acid. What is the concentration of the acid?
24 M.
25 M.
0.02 M.
0.04 M.
A solution of sulphuric acid contains 50 g of the acid in 300 cm³ of solution. What is the concentration of the solution in g/dm³?
0.17 g/dm³.
0.51 g/dm³.
166.67 g/dm³.
1. 70 g/dm³.