Electrolysis of acidulated water
In this activity, it can be observed that gas bubbles evolve at the electrodes. The gas evolved get collected in the test tubes. The volume of the gas collected at the negative electrode is approximately twice the volume of the gas collected at the positive electrode.
It can be examined that hydrogen gas evolves at the negative electrode and oxygen gas evolves at the positive electrode. (by identification test)
Thus, during electrolysis, water is splitted into more simpler substances, hydrogen and oxygen.
electricity is conducted through any substance in liquid state.
solutions conduct electricity through mobile ions.
LIQUIDS OR SOLUTIONS WHICH CONDUCT ELECTRICITY ARE CALLED ELECROLYTES.
LIQUIDS OR SOLUTIONS WHICH DO NOT CONDUCT ELECTRICITY ARE CALLED NON-ELECTROLYTES.
compounds such as sodium chloride and copper sulphate are known as ionic compounds.
when an ionic solid is heated and brought to liquid state, it is called a fused substance.
When electricity is conducted through an electrolyte, the conducters through which the electric current enters the electrolyte and exists are called electrodes.
There are 2 types of electrodes. They are,
1. Positive electrode
2. Negative electrode
The electrode connected to the positive terminal of the external supply of electricity is called the positive electrode.
The electrode connected to the negative terminal of the external supply of electricity is called the negative electrode.
The chemical change effected by passing an electric current through an electrolyte is known as ELECTROLYSIS..........
During this process, the electrolyte is converted into more simpler components.
A substance that doesn't react chamically with the electrolyte reffered as inert electrodes. Carbon (graphite) and platinum electrodes are such examples...