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factfinder
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why platinum is used in some half cells and not in others?
Platinum is used in some half cells because it is a highly stable and inert metal. It does not react with the electrolyte solution or the reactants in the half cell, making it ideal for use as an electrode material.
Platinum is not used in all half cells because it is a relatively expensive metal. In some cases, other less expensive materials such as carbon or nickel may be suitable for use as electrodes in a half cell.
Platinum is an excellent conductor of electricity and allows for efficient transfer of electrons in the half cell. It also has a large surface area, which increases the active sites available for reactions to occur, resulting in better performance of the half cell.
The decision to use platinum in a half cell is based on several factors, including the type of reaction taking place, the type of electrolyte solution used, and the overall cost of using platinum as an electrode material.
Yes, there are alternatives to using platinum in a half cell. As mentioned earlier, carbon and nickel are commonly used as electrode materials in some half cells. Additionally, in some cases, non-metallic materials such as graphite or conductive polymers can also be used as alternatives to platinum.