Cr2O72- + C2H5OH --> Cr3+ + C2H4O2
Which substance is a reductant (reducing agent) and which is an oxidant (oxidizing agent)?
Cr2O72-(aq) + NO2-(aq) --> NO3-(aq) + Cr3+(aq) (acidic solution)
How many water molecules are needed and on which side of the equation must they appear?
Fe3+(aq) + H2(g) --> 2H+ + Fe2+, E°cell = 0.77.
Determine E° for the reaction
e- + Fe3+(aq) --> Fe2+(aq).
Pb + 2Ag+ --> Pb2+ + 2Ag
(i) oxidation occurs at the anode
(ii) reduction occurs at the cathode
(iii) a reducing agent is oxidized during a redox reaction