Question

What is skeletal equation. Give an
7. In certain chemical reactions, precipitate is formed. State the colour and name of the precipitate formed
in each of the following reactions which involves the addition of:
(a) sodium chloride to silver nitrate
(b) ammonium hydroxide to iron (III) chloride
(c) copper (II) sulphate to sodium hydroxide
(d) iron (II) sulphate to sodium hydroxide
(e) potassium iodide to lead acetate.​

Answer 1

Answer:

Solution:

1. AgNO_3+HCl→HNO_3+AgClAgNO 3

+HCl→HNO 3 +AgCl

• Precipitate - AgCl - Silver chloride
• Colour - Milky white

2. FeSO

4

+2NaOH→Na

2

SO

4

+Fe(OH)

2

↓

• Precipitate - Iron [II] hydroxide
• Colour - dirty green

FeCl_3+3NH_4OH→3NH_4Cl+Fe(OH)_3↓FeCl

+3NH OH→3NH

4Cl+Fe(OH)

3 ↓

• Precipitate - Iron [III] hydroxide
• Colour - reddish brown

CuSO_4+2NaOH→Na_2SO_4+Cu(OH)_2↓CuSO

4 +2NaOH→Na

2 SO

4 +Cu(OH) ↓

• Precipitate - Copper [II] Hydroxide
• Colour - pale blue

Pb(NO_3)_2+2NH_4OH→2NH_4NO_3+Pb(OH)_2↓Pb(NO

3 ) 2 +2NH

4 OH→2NH

4 NO

3 +Pb(OH)

2↓

Precipitate - Lead hydroxide

Colour - chalky white