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Srebrov nitrat, s kemijsko formulo AgNO3, je reagent za dokaz Ag+ ionov v kvalitativni analizi. Ob dodatku AgNO3 nastane težko topni bel AgCl. Reakcija je selektivna, saj se ob prisotnosti HNO3 obarja le AgCl.
- Ag+ + Cl- ⇔ AgCl
AgCl je topen v NH3 ( KCN, Na2S2O3):
- AgCl + 2NH3 ⇔ [Ag(NH3)2]+ + Cl-
Ob dodatku HNO3 pa se znova obarja AgCl:
- [Ag(NH3)2]+ + Cl- + 2H+ ⇔ AgCl + 2NH4-
Srebrov nitrat v industriji uporabljajo predvsem za ogledala.
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