Predicting redox reactions Single replacement reactions we went over a few chapters ago are all redox reactions. Here are the same examples, this time.

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Presentation transcript:

Predicting redox reactions Single replacement reactions we went over a few chapters ago are all redox reactions. Here are the same examples, this time write out the net ionic equation The change will be the charge!!

Examples Zinc is added to a solution of cobalt (II) chloride Cadmium is added to a solution of barium iodide Lithium is added to a solution of copper (II) chlorate Chromium is left in water

Examples Potassium is added to sulfuric acid Silver is added to hydrochloric acid Chlorine gas is bubbled through a solution of sodium bromide

Common Oxidizing/reducing agents Oxidizing agentProductReducing AgentProduct MnO 4 - in acidMn 2+ H2O2H2O2 O2O2 MnO 2 in acidMn 2+ Halogens (dilute basic) Hypohalite ion (hypochlorite) MnO 4 - in baseMnO 2 CrO 4 2- in acidCr 3+ halogens (conc basic) Halate ion (chlorate) Cr 2 O 7 2- in acidCr 3+ HClO 4 Cl - Free metalsMetal ions Na 2 O 2 NaOH H2O2H2O2 H2OH2OC 2 O 4 2- CO 2 H 2 SO 4 conc.SO 2 Sulfite or SO 2 SO 4 2- Free halogensHalide ion Free halogen HNO 3 conc.NO 2 NO 2 - NO 3 - HNO 3 diluteNO Metal ionsLower oxidation number Metal ionHigher oxidation number

IMPORTANT For every redox equation, you have to have both an oxidizing agent and a reducing agent!! Otherwise it doesn’t work.

Examples Bromate reacts with bromide in an acidic solution Permanganate reacts with oxalate in an acidic solution Calcium metal reacts with permanganate in a sodium hydroxide solution

Example Chromate reacts with chloride in an acidic solution Chlorine reacts with permanganate in a concentrated solution of sodium hydroxide

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