Editing Balancing Redox Reactions By Half Cell
ApchemWiki
|
RecentChanges
|
Preferences
There are two ways to balance an Oxidation Reduction (Redox) reaction.<br> *By using the oxidation numbers **See this webpage for details, [http://tmcleod.org/cgi-bin/chem1/wiki.cgi?Balancing_Redox_Reaction_By_Oxidation_Number 1st Year Balancing Redox Reaction by Oxidation Number]). **To complete this balancing, one has to be given all the species (both all reactants and all products). <br> *By Half Cell reaction. (Can also look in Zumdahl, AP book, Section 18.1, Pg817-823)<br> <br> A benefit for balancing by Half cell, one does not need all the species in the Redox reaction since you will generating the overall reaction as you performing the balancing. The procedures are as follows:<br> <center><u>Balancing Redox Reaction by Half Cell Method (<b>In acid solution</b>)</u></center><br> <br> 1. Break equation into two half cell. <br> 2. Then for each half cell, do the following:<br> 2a. Balance atoms (except for Oxygen and hydrogen))<br> 2b. Balance O with H<sub>2</sub>O<sub>1</sub><br> 2c. Balance H with H<sup>1+</sup><br> 2d. Balance charge with add e<sup>-</sup><br> 3. Balance electron by multiple whole half cell by a coefficient so that the total number of electron gained is lost in each half cell<br> 4. Write half cell together and add them together to get overall reaction. <br> <center><u>Balancing Redox Reaction by Half Cell (In <b>Basic Solution</b>)</u></center><br> 1. You will complete Step 1 - 4 above<br> 2. Add as many OH<sup>1-</sup> to each side to remove any H<sup>1+</sup> 3. Any H<sup>1+ and OH<sup>1-</sup> on same side of --> combine to form H<sub>2</sub>O<br> 4. Balance both side of the overall reaction by H<sub>2</sub>O<br> 5. Rewrite as overall reaction <u>Example of Work (does not show in basic solution example)</u><br> *[http://www.tmcleod.org/AP/APElectrochemistry/APBalancingHalfCellExampleofWork.pdf Example of Balancing Redox Reaction by Half Cell] <br>
View other revisions
ApchemWiki
|
RecentChanges
|
Preferences