Analytical ChemistryHard
Question
Zinc pieces are added to acidified solution of SO32-. Gas liberated can :
Options
A.turn lead acetate paper black
B.turn lime water milky
C.give white precipitate with AgNO3 solution
D.decolourize acidified KMnO4 solution
Solution
SO32- + Zn + 8H+ → H2S ↑+ 3Zn2+ + 3H2O
Pb2+ + S2- → PbS ↓ (black)
Ag+ + S2- → Ag2S↓ (black)
2MnO4- + 5H2S + 6H+ → 2Mn2+ + 5S + 8H2O
Pb2+ + S2- → PbS ↓ (black)
Ag+ + S2- → Ag2S↓ (black)
2MnO4- + 5H2S + 6H+ → 2Mn2+ + 5S + 8H2O
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