give an activity to demonstrate the electrolysis of water
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To demonstrate the electrolysis of water :
Materials Required : A battery of 9V (six cells of 1.5 V),two graphite pencils, a beaker,tap water, connecting wires and tape.
Procedure : Sharpen Both ends of both the pencil. Fill the beaker with tap water. Make a simple circuit. Secure the wire with tapes. Use a piece of cardboard to hold the pencils in a vertical position. Place the exposed tips of the pencil in the water,such that tips are fully submerged but are not touching the bottom. Now wait for 3-4 minutes.
Small gas bubbles are seen to be getting formed near the electrodes. We can call this change,taking place in tap water,a chemical change.
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- One Battery of 9V
- Two Graphite Pencils
- One Beaker
- Tap Water
- Connecting Wires and tape
- Sharpen both ends of both the pencils.
- Fill the beaker with tap water. Make sure that the contact with the Graphite in the pencils is perfect
- 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.
- Small Gas Bubbles will formed near the electrodes.
- The change takes place in the tap water is the Chemical Change.
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