Analytical ChemistryHard
Question
Which of the following reagents turns white precipitate of AgCl yellow ?
Options
A.NaI
B.Na3AsO3
C.Na3AsO4
D.NaCN
Solution
3AgCl + Na3AsO3 → Ag3AsO3↓ (yellow) + 3Cl- + 3Na+.
AsO43- + 3Ag+ → Ag3AsO4 ↓ (brownish-red).
AsO43- + 3Ag+ → Ag3AsO4 ↓ (brownish-red).
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