Four solutions must be prepared, which should contain the following ph values: 1, 4, 9 and 12. the following chemicals are available:
- sulphuric acid (96% m/m)
- ethanoic acid (qpp%)
- ammonia solution (25% (m/m))
- sodium hydroxide platelets
a) name the appropriate chemicals that can be used to prepare the four solutions. write a reaction to explain the choice of the chemicals for each of the four solutions.
b) calculate the required mass of the chemicals that is needed to make 250ml of the solution (total of 4 solutions must be calculated).
if it involves a buffer solution, assume that:
total concentration = [acid] + [base] = 1m
ethanoic acid 100%