All phosphates are insoluble, except for the following ions. Ag+ O Hg22+ O Pb2+ Ca2+ OSr2+ OBa2+ NH4+ n alkali metals O There are no known exceptions. All hydroxides are insoluble, except for the following ions. O Ag Pb2+ Ca2+ OSr2+ Ba2+ O alkali metals V There are no known exceptions.

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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.