PLZ TELL ME FACTORS OF HALF CELL REACTION....
PLEASE PLEASE..
Answers
A half cell is one of the two electrodes in a galvanic cell or simple battery. For example, in the Zn-Cu battery, the two half cells make an oxidizing-reducing couple.
Placing a piece of reactant in an electrolyte solution makes a half cell. Unless it is connected to another half cell via an electric conductor and salt bridge, no reaction will take place in a half cell.
On the cathode, reduction takes place.
Oxidant + n e- ® Reductant
Example: Cu2+ + 2 e ® Cu
Cu2+ is the oxidizing agent and Cu the reducing agent.
On the anode, oxidation takes place.
Reductant ® n e- + Oxidant
Example: Zn ® Zn2+ + 2 e-.
Zn is the reducing agent, and Zn2+ the oxidizing agent.
A battery requires at least two electrodes, the anode at which oxidation occurs, and the cathode at which reduction occurs. Reduction and oxidation are always required in any battery setup.
A battery operation requires an anode, a cathode, a load, and a salt bridge (if the salt bridge is not there already). These are the key elements of a battery.
Electrochemistry is the science that studies this union of chemistry and electricity. Batteries and fuel cells utilize spontaneous redox processes to convert chemical energy into electrical energy.