Question

Copy and complete the following sentence:

With platinum electrodes hydrogen is liberated at the ____________ and oxygen at the ______________ during the electrolysis of acidified water.

• A. cathode
• B. anode

Answer 1

• A cathode is an electrode in the electrolytic cell through which conventional current flows out that forms the negative charge on the rod.
• An anode is an electrode in the electrolytic cell through which conventional current flows into the device which forms the positive charge over the rod.
• As we know the rule the opposite charges attract each other.
• Hydrogen has a positive while oxygen has a negative ion.
• So, with platinum electrodes, hydrogen is liberated at the cathode and oxygen at the anode during the electrolysis of acidified water.