ExchangeReactions_vs_RedoxRxns_demos

ExchangeReactions_vs_RedoxRxns_demos - Exchange Reactions...

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Exchange Reactions Redox Reactions Exchange Example 1: Adding together solutions of sodium sulfide & cadmium nitrate sodium cadmium sodium cadmium ++ sulfide nitrate nitrate sulfide Na 2 S ( aq ) + Cd(NO 3 ) 2 ( aq ) NaNO 3 ( aq ) + CdS ( s ) Net ionic reaction: S 2- ( aq ) + Cd 2+ ( aq ) CdS ( s ) Exchange Example 2: Add ammonia to a solution of copper (II) nitrate Step 1: ammonia reacts with water (ammonia is a weak base) NH 3 ( aq ) + H 2 O ( l ) NH 4 + ( aq ) + OH ( aq ) Step 2: copper (II) ions react with hydroxide ions Cu 2+ ( aq ) + OH ( aq ) Cu(OH) 2 ( s ) Overall reaction: NH 3 ( aq ) + H 2 O ( l ) + Cu 2+ ( aq ) NH 4 + ( aq ) + Cu(OH) 2 ( s ) Redox Example 1: Sodium metal added to aqueous hydrochloric acid a) hydrochloric sodium sodium + + hydrogen acid chloride Na ( s ) + HCl ( aq ) NaCl ( aq ) + H 2 ( g ) Net ionic reaction: Na ( s ) + H + ( aq ) Na + ( aq ) + H 2 ( g ) b) nitric sodium sodium + + hydrogen acid nitrate
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This note was uploaded on 12/02/2011 for the course PHYSICS 235 taught by Professor Staff during the Fall '08 term at Rutgers.

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