Chemistry
State your observations:
(a) HCl gas is passed through lead nitrate solution and the mixture is heated.
(b) Hydrochloric acid is added to silver nitrate solution.
(c) Ammonium hydroxide solution is added to the resultant product of part (b).
Hydrogen Chloride
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Answer
(a) When HCl gas is passed through lead nitrate, white precipitate of lead chloride is formed.
Pb(NO3)2 + 2HCl ⟶ PbCl2 ↓ + 2HNO3
(b) Hydrochloric acid, when reacted with silver nitrate solution it gives a thick curdy white precipitate of silver chloride. This white precipitate is insoluble in nitric acid.
AgNO3 + HCl ⟶ AgCl ↓ + HNO3
(c) On addition of ammonium hydroxide, the resultant of part (b) i.e., thick curdy white precipitate of silver chloride dissolves and forms a complex salt called diammine silver (I) chloride.
AgCl + 2NH4OH ⟶ [Ag(NH3)2Cl)] + 2H2O
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