Question

a. In certain reactions an insoluble solid called
precipitate is formed. State the color and name
of the precipitate formed in each of the following
reactions involving addition of : (i) Dilute
hydrochloric acid to silver nitrate. (ii) Lead nitrate
to ammonium hydroxide. ​

Answer 1

Explanation:

AgNO

3

+HCl→HNO

3

+AgCl

Precipitate - AgCl - Silver chloride

Colour - Milky white

FeSO_4+2NaOH→Na_2SO_4+Fe(OH)_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

3

+3NH

4

OH→3NH

4

Cl+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)

2

↓

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