What process occurs in an oxidation-reduction (redox) reaction? What happens to

Question

What process occurs in an oxidation-reduction (redox) reaction? What happens to the species that is oxidized? What happens to the species that is reduced? redox process is reductin, is gains of electrons and oxidation is loss of electrons specie oxidized loses electrons and transfer them to the reduced specie reduced gains electrons from the oxidized specie What is the reducing agent, and is the oxidizing agent in a redox reaction? reducing agent: Split the following chemical equation into half-reactions, complete the half-reactions (and balance them), and recombine both half-reactions to complete and balance the entire equation MnO4 -(aq) + Fe2+(aq)Acid rightarrow Fe3+(aq) + Mn2+(aq) True or False: The oxidation occurs at the anode of a galvanic cell. True or False: Electrolytic cells create chemical reactions True or False: Galvanic cells are batteries and electrolysis of these cells recharges them.

Explanation / Answer

9. Reducing agent --> the specie that favours the reduction of other specie, by donating its electrons to it

Oxidizing agent ---> the specie that favours oxidation, by stripping electrons to itself

10.

MnO4- + Fe+2 H+ = Fe3+ + Mn2+

Fe2+(aq) ---> Fe3+(aq) (oxidation)

MnO4-(aq) ---> Mn2+(aq) (reduction)

then

Fe2+(aq) ---> Fe3+(aq) + e-

MnO4-(aq) + 8H+(aq) + 5e- ---> Mn2+(aq) + 4H2O

multiply by 5

5Fe2+(aq) ---> 5Fe3+(aq) + 5e-

MnO4-(aq) + 8H+(aq) + 5e- ---> Mn2+(aq) + 4H2O

add

MnO4-(aq) + 8H+(aq) + 5e- + 5Fe2+(aq) ---> 5Fe3+(aq) + 5e- + Mn2+(aq) + 4H2O

cancel common ions

MnO4-(aq) + 8H+(aq) + 5Fe2+(aq) ---> 5Fe3+(aq) + Mn2+(aq) + 4H2O

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