1.

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 or insoluble) in (vi) to (x). Aqueous salt solution Colour of precipitate when NaOH is added in a small quantity Nature of precipitate (soluble or insoluble) when NaOH is added in excess Copper (II) sulphate Zinc nitrate Lead nitrate Calcium chloride Iron (III) sulphate (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) (ix) (x)

Answer» 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 or insoluble) in (vi) to (x).













Aqueous salt

solution



 Colour of precipitate

when NaOH is added

in a small quantity

 Nature of precipitate

(soluble or insoluble)

when NaOH is added

in excess
Copper (II) sulphate

Zinc nitrate

Lead nitrate

Calcium chloride

Iron (III) sulphate		 (i)

(ii)

(iii)

(iv)

(v)		 (vi)

(vii)

(viii)

(ix)

(x)


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