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Platinum should be used when there is no metal present to conduct electrons from the anode to the cathode. You would include platinum when a solid metal isn't present to allow for the transfer of electrons.
Hussain Chharawalla 1G wrote:However, as mentioned in lecture, remember that platinum one one side of the cathode or anode does not imply it is being used on both ends.
How do you know when you need to put it on both ends?
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