|

Chemistry

Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions 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 (i) (vi)
Zinc nitrate (ii) (vii)
Lead nitrate (iii) (viii)
Calcium chloride (iv) (ix)
Iron (III) sulphate (v) (x)

Practical Chemistry

4 Likes

Answer

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	(i) *Pale blue*	(vi) *Insoluble*
Zinc nitrate	(ii) *White gelatinous*	(vii) *Soluble*
Lead nitrate	(iii) *White chalky*	(viii) *Soluble*
Calcium chloride	(iv) *White curdy*	(ix) *Insoluble*
Iron (III) sulphate	(v) *Reddish brown*	(x) *Insoluble*

Answered By

2 Likes

Related Questions

Use the information given in (a) to (h) to identify the substances P to W selecting your answers from the given list.
List
Calcium Oxygen Copper (II) oxide
Carbon Calcium hydroxide Copper (II) nitrate
Lead (II) oxide Hydrogen chloride Chlorine
Lead (II) nitrate Calcium oxide Ammonium chloride
(a) P is a white solid. When heated produces white fumes (sublime).
(b) P and R on warming produce an alkaline gas.
(c) On adding water to T, heat is evolved and R is formed.
(d) Q burns brightly in air to form T.
(e) When S is heated, it gives off brown fumes and leaves a black residue of U.
(f) A solution of S is formed by warming U with dilute nitric acid.
(g) V is a gaseous non-metallic element that reacts with hydrogen to form W.
(h) A solution of W will neutralise the solution of R.
View Answer