Oxidation and Reduction in Chemical Cells In a simple voltaic cell, two different metals are in contact with an electrolyte.The more electropositive metal will become the negative terminal while the less electropositive metal will become the positive terminal.The chemical change that takes place at each electrode is actually a half-reaction … [Read more...] about Oxidation and Reduction in Chemical Cells
Rusting as a Redox Reaction
Redox Reactions by Transfer of Electrons at a Distance
Redox Reactions by Transfer of Electrons at a DistanceIn all redox reactions, electrons are transferred from the reducing agent to the oxidising agent. When the reducing and oxidising agents are mixed together as in the previous reactions, the transfer of electrons occurs quickly and cannot be detected. However, when the reducing and oxidising agents are separated … [Read more...] about Redox Reactions by Transfer of Electrons at a Distance
Changing of iron(II) ions to iron(III) ions and vice versa
Changing of iron(II) ions to iron(III) ions and vice versaIron exhibits two oxidation numbers (a) +2 as iron(II) ion, Fe2+ (b) +3 as iron(III) ion, Fe3+ An aqueous solution containing iron(II) ions, Fe2+ is pale green in colour, whereas that containing iron(III) ions, Fe3+ is yellow/yellowish-brown/ brown in colour. Changing iron(II) ions to iron(III) ions is an … [Read more...] about Changing of iron(II) ions to iron(III) ions and vice versa
Oxidation and Reduction in Electrolytic Cells
Oxidation and Reduction in Electrolytic Cells In an electrolytic cell, an electric current is passed through an electrolyte using electrodes. The electrolyte may be a molten ionic compound or an aqueous solution containing ions. The electrodes are usually inert conductors such as platinum or carbon. Sometimes active electrodes such as copper are used. … [Read more...] about Oxidation and Reduction in Electrolytic Cells
Electrolytic and Chemical Cells
Electrolytic and Chemical CellsRedox reaction occurs in both electrolytic and chemical cells. An electrolytic cell is a device that uses electricity from an external source to drive a redox reaction. On the other hand, a chemical cell is a device that uses redox reaction to produce electricity. The two cells differ in the following … [Read more...] about Electrolytic and Chemical Cells