Test For…

Question 1

Magnesium ion

Answer 1

Flame test - bright white flame

Question 2

Sodium ion

Answer 2

Flame test - golden yellow flame

Question 3

Calcium ion

Answer 3

Flame test - brick red flame

Question 4

Copper ion

Answer 4

Flame test - bluish green flame

Question 5

Potassium ion

Answer 5

Flame test - lilac flame

Question 6

Chloride ion

Answer 6

Silver nitrate solution —> white ppt
Excess nitric acid —> white ppt remains
White ppt = silver chloride

Question 7

Water (1)
Water (2)

Answer 7

(1) anhydrous copper (II) sulphate white —> blue
(2) dry cobalt (II) chloride paper Blue —> pink

Question 8

Carbonate ion

Answer 8

Add acid to carbonate-containing compound —> colourless gas bubbles (carbon dioxide)