Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solution of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride and iron (III) sulphate. Copy the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble/insoluble) in (vi) to (x).
| Aqueous salt solution |
Colour of ppt. when NaOH is added in a small quantity |
Nature of ppt. (soluble/ insoluble) when NaOH is added in excess |
| Copper (II) sulphate |
(i) |
(vi) |
| Zinc nitrate |
(ii) |
(vii) |
| Lead nitrate |
(iii) |
(viii) |
| Calcium chloride |
(iv) |
(ix) |
| Iron (III) sulphate |
(v) |
(x) |
