One of the prominent effects of the chemical reaction, taking place at the electrodes and within the solution due to the flow of current through it, is –‘gaseous bubbles may get formed near the electrodes’. Describe an experimental activity in brief to justify this statement. Also draw a proper labelled diagram of its experimental setup.
Answers
Answer:
One of the prominent effects of the chemical reaction, taking place at the electrodes and within
the solution due to the flow of current through it, is –‘gaseous bubbles may get formed near the
electrodes’.
Describe an experimental activity in brief to justify this statement. Also draw a proper labelled
diagram of its experimental setup.
Answer:
Take out carbon rods carefully from two discarded cells. Clean their metal caps with sand paper. Wrap copper wires around the metal caps of the carbon rods and join them to a battery . We call these two rods electrodes. (Instead of carbon rods, you may take two iron nails about 6 cm long ).Pour a cupful of water in a glass/plastic bowl. Add a teaspoonful of salt or a few drops of lemon juice to water to make it more conducting. Now immerse the electrodes in this solution. Make sure that the metal caps of the carbon rods are outside the water. Wait for 3-4 minutes. Observe the electrodes carefully. You will notice gas bubbles near the electrodes. We call the change taking place in the solution a chemical change.