Question

Determine which element is oxidized and which element is reduced in reactions below (be sure to include the oxidation state of each):

CO32- + 2H+→CO2 + H2O

Answer 1

$CO_3^{2-}$ :

$C^{+4}$ $O^{-2}$

$H^+$

$CO_2$

$C^{+4}$ $O^{2-}$

$H_2O$

$H^+$ $O^{2-}$

No one change it oxidation state so this reaction is not oxidance reduced