SCHEDULE 2Methods of analysis
Part II
6.DETERMINATION OF THE NEUTRALISING VALUE IN LIMING MATERIALS
REAGENTS
3.
3.1
Hydrochloric acid, 0.5 M solution.
3.2
Sodium hydroxide, 0.5 M solution (carbonate free).
3.3
Phenolphthalein indicator solution: dissolve 0.25 g phenolphthalein in 150 ml 95% ethanol and dilute with water to 250 ml.