JEE MAIN - Chemistry (2004 - No. 40)
The $$E_{{M^{3 + }}/{M^{2 + }}}^o$$ values for Cr, Mn, Fe and Co are – 0.41, +1.57, + 0.77 and +1.97 V
respectively. For which one of these metals the change in oxidation state form +2 to +3 is
easiest?
Fe
Mn
Cr
Co
Giải thích
The given values show that $$Cr$$ has maximum oxidation potential, therefore its oxidation will be easiest. (Change the sign to get the oxidation values)