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Unformatted text preview: Co 2+ (aq)+7NO 2-(aq)+3K + (aq)+2H + (aq) ↔ NO(g)+H 2 O(l)+K 3 [Co(NO 2 ) 6 ] (s) Co is being oxidized from an oxidation number of +2 to +3. N is being reduced from an oxidation number of +3 to +2. 3. The chloride ion came from the HCl that was added to the solution containing the three ions in the first step. It had reacted with the Ag + ion in the solution to produce AgCl (s), which was then dissolved in NH 3 (aq), where it dissociated into Ag(NH 3 ) 2 + (aq) and Cl-(aq), the chloride ion. The addition of nitric acid caused a reaction between NH 3 and itself, causing the Ag + ion to re-precipitate out of solution as AgCl....
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This note was uploaded on 02/25/2012 for the course CHEM 2142 taught by Professor Roberts during the Fall '10 term at Texas State.
- Fall '10