A2 - Balancing Redox Reactions.docx - Balancing redox...

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Balancing redox reactions Some of the examples we will solve involve chemical equations in aqueous solutions, which can be acidic or basic:Acidic solutions will contain hydrogen ions.Basic solutions will contain hydroxide ions.These ions play a crucial part in balancing the half reaction. Here is a list of steps that you can follow to make sure you include the ions at the right place:Write the chemical formulas for the reactants and products.Balance all atoms, other than O and H.Balance O by adding H2O(l)(on the proper side of the equation).Balance H by adding +¿H(aq)¿(on the proper side of the equation).Balance the charge on each side by adding e-and cancel anything that is the same on both sides.(for basic solutions only:)Add ¿OH(aq)¿to both sides of the equation to equal the number of+¿H(aq)¿present.Combine +¿H(aq)¿and¿OH(aq)¿on the same side to formH2O(l). Cancel equal amounts of H2O(l)from both sides.Example: Write a balanced half-reaction for the oxidation of ethanol, C2H5OH, to acetic acid, CH3CO2H, in acid solution.

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