A rod of magnesium is typically placed in a water heater as a sacrificial anode. A certain magnesium anode has a mass of 300 g. The current that develops between the water heater and the anode is 10mA. How many years will it take for the anode to completely corrode away?

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Electrolysis

Electrolysis is defined as the process of breaking down ionic compounds into their constituent elements by passing a direct electric current through the compound in a fluid state. The cathode reduces cations, while the anode oxidizes anions. An electrolyte, electrodes, and some form of external power source are the main components required for conducting electrolysis. A partition, such as an ion-exchange membrane or a salt bridge, may also be used, but this is optional. These are primarily used to prevent the products from diffusing near the opposing electrode.