In galvanic cell, how can we choose one metal to be anode from the two metals
One way to choose which metal should be the anode in a galvanic cell is to refer to the standard electrode potential (E°) of each metal. The metal with the higher standard electrode potential will be the anode, as it will be more likely to undergo oxidation and lose electrons.
Another way to choose which metal should be the anode is to consider the reactivity of the metals. Generally, the more reactive metal will act as the anode, as it will be more likely to undergo oxidation and lose electrons.
Additionally, the metal that is more likely to form positive ions in solution will typically be the anode, as it will be more likely to donate electrons and undergo oxidation.
Ultimately, the choice of which metal should be the anode in a galvanic cell will depend on a combination of the standard electrode potential, reactivity, and ability to form positive ions in solution.