Respuesta :
In the galvanic cell reaction Mn(s) + Zn²⁺ (aq) → Mn²⁺ (aq) + Zn(s) , Zn²⁺ is reduced.
Which species in a reaction is reduced, and how can one determine this?
Redox reactions, also known as oxidation-reduction reactions, are reactions in which an atom or ion in one reactant loses an electron and an atom or ion in another reactant gains an electron. The balanced equation for a redox reaction does not represent the electrons that are being transported, despite the fact that electrons are acquired and lost in these reactions. An element loses electrons during oxidation, increasing the element's oxidation number (becomes more positive). When reduction happens, an element receives electrons and has a lower or lowered oxidation number (becomes more negative).
The element reduced is the one whose oxidation number decreased, in this Zn oxidation number is reduced from +2 to 0. Thus, Zn²⁺ is reduced.
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