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The standard reduction potential of Al (Al 3+ + 3e - = Al) is -1.66. It is the reduction potential of Al (Al 3+ /Al) that is -1.66, but when Al is acting as anode and getting oxidised to Al 3+ , the E cell of Al/Al 3+ cell is given to be -1.66. How is it possible to have the samve value of -1.66 for both oxidation and reduction?
Because Al in one cell act as anode and in other act as cathode so Al has same value but opposite sign
Dear student Please refer the link below https://www.askiitians.com/iit-jee-chemistry/physical-chemistry/concentration-cell.aspx Good Luck cheers
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