Question

what is electrolysis ?explain electrolysis of water.....​

Answer 1

$\bf \large{ \sf \: Electrolysis \: of \: Water }$

Passage of Electricity through water is termed as Electrolysis. This phenomenon was called by Michael Faraday because it can cause chemical changes within the solution.

To Demonstrate The Electrolysis of Water :

Material Required : A battery of 9V,Two Graphite Pencils,A Beaker,Tap Water, Connecting Wires and tape

Procedure : Sharpen both ends of both the pencils. Fill the beaker with tap water. Make a simple circuit as shown in the Diagram. It is important to make good contact with the Graphite In the pencils. Secure the wires with tape. Use a piece of Cardboard to hold the pencils in a vertical position. Place the exposed tips of the pencils in the water,such that tips are fully submerged but aren't touching the bottom. The pencil is being used as ELECTRODE here. Now,Wait for 3-4 minutes and observe carefully.

Observation : Small Gas Bubbles are seen to be getting formed near the electrodes. This change,taking place in the tap water will be termed as Chemical Change.

More Info :

William Nicholsan, showed that if Electrodes were immersed in water and a steady current was passed through it,bubbles of Oxygen and Hydrogen are produced. Oxygen bubbles on Anode(Positive) and Hydrogen bubbles on Cathode(Negative).

Chemical Changes that may take place while Electrolysis are :

• Metals may get deposited at the electrode.

• Gaseous Bubbles may get formed near the Electrodes.

• Change of colour of Solution may occur due to dissolution of different Ions.

Answer 2

In chemistry and manufacturing, electrolysis is a technique that uses a direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell.