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
(c) potassium iodide to lead acetate
Answers
Answer:
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
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