Analytical ChemistryHard

Question

White precipitate of PbSO4 gets dissolved in :

Options

A.concentrated H2SO4 on heating
B.concentrated NaOH
C.(NH4)2CO3
D.dilute HNO3

Solution

(A) PbSO4↓ + H2SO4 (hot and concentrated) →  Pb2+ + 2HSO4- (soluble)
(B) It dissolves forming Na2[Pb(OH)4] soluble complex.

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