chemistry. about elctrochemistry?

Question

a type of electrolyte is enough to convert chemical energy into electrical energy. but why we separate it like in daniel cell

Answer 1

You can get unwanted chemical reactions going on, which is one reason. Each electrode is supposed to be placed in a solution of its own ions, but with two different metals, you would have to have a mixture of two electrolytes in theory. Or you would have to have a soggy and fragile salt bridge, probably made out of paper. So in the Daniell Cell, the two electrolytes are kept apart, but ions can still flow through the walls of the pot. This avoids (mostly) one solution contaminating the other.