EMPA Tests

Question 0

Test for calcium, aluminium and magnesium ions?

Answer 0

Mix with NaOH; a white precipitate will form. Aluminium hydroxide redissolves; the others do not (so probably magnesium in mock empa due to calcium having a more vigorous reaction which we did not see).

Question 1

Sulphate Ions Test?

Answer 1

Dilute HCl then Barium Chloride. If a white precipitate forms, there are sulphate ions present. (So no sulphate ions in mock empa)