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What are the expected observations for the following anion tests: CrO₄²⁻ with AgNO₃(aq) + NH₃(aq) then dil HNO₃, and Cr₂O₇²⁻ with Dil. SnCl₂(aq)?
Chemistry
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Here are the observations for the remaining anion tests:
-
CrO₄²⁻
- Reagent: AgNO₃(aq) + NH₃(aq) then dil HNO₃
- Observation: Reddish-brown precipitate formed. Precipitate dissolves in NH₃(aq) and reappears upon addition of dil HNO₃.
-
Cr₂O₇²⁻
- Reagent: Dil. SnCl₂(aq)
- Observation: Orange solution turns green.
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