“4.4 REAGENTS
Sodium hydroxide solution, 30 g per 100 ml, ammonia free.
Sulphuric acid, 0.1 N solution. Sodium or potassium hydroxide, 0.1 N solution, carbonate free. | for variant (a) (page 19) |
Sulphuric acid, 0.2 N solution. Sodium or potassium hydroxide, 0.2 N solution, carbonate free. | for variant (b) (page 19) (See Note on page 18) |
Sulphuric acid, 0.5 N solution. Sodium or potassium hydroxide solution, 0.5 N, carbonate free. | for variant (c) (page 19) (See Note on page 18) |