Anode in electrolytic cell is positive charged but in electrochemical cell it is negative charged….? why?
(may be broke/outdated!)
Anode in electrolytic cell is positive charged but in electrochemical cell it is negative charged….? why?
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An electrochemical cell creates electrical energy from a difference in electrochemical potential of for example two metals such as copper and zinc. Electrons flow from the anode round an electrical circuit to the cathode where they are used to create ions which can flow through a salt bridge back to the anode, this creates a voltage, batteries are an example of this. Electrolytic cells use an external voltage to turn electrical energy into chemical energy. A good example is the electrolysis of water. Using two carbon electrodes, you place a voltage across them, at the cathode you get a reduction, of H+ combining with electrons to form Hydrogen gas. At the anode you get an oxidation of OH- giving up an electron and an H+ to form oxygen. I found them REDCAT and AN-OX helped me remember how cells work, along with OILRIG, so REDCAT means reduction happens at the cathode, AN-OX means oxidation occurs at the anode, and OILRIG means oxidation is loss, reduction is gain (of electrons).