In the reaction: Which element is oxidized? 2 K₂S2O3 + I2 → K₂S4O6 + 2 KI Which element is reduced? Which substance is the oxidizing agent? Which substance is the reducing agent? | What is the oxidation number for S in K₂S₂O₂?

2Cr³+ + CIO3 + 4H₂O—Cr₂O7²- + CI¯+ 8H+ In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element oxidized: formula of the oxidizing agent: name of the element reduced: formula of the reducing agent:

The following skeletal oxidation-reduction reaction occurs under acidic conditions. Write the balanced OXIDATION half reaction. Co2+ + NO  Co + NO3-

Aluminum is produced commercially by the electrolysis of Al2 O3 in the presence of a molten salt. If a plant has a continuous capacity of 1.49 million A, what mass of aluminum can be produced in 3.00 h? Mass = g

In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element oxidized: 3Ag + Cr³+→→→→Cr + 3Ag+ formula of the oxidizing agent: name of the element reduced: formula of the reducing agent:

19c and 17b

N2H4 + Hg+ H2OHgO + 2NH3 In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element oxidized:     name of the element reduced:     formula of the oxidizing agent:     formula of the reducing agent:

What is oxidized in this reaction?   Fe(s) + HCl(aq) → FeCl3(aq) + H2(g)

a) Balance the following redox reaction occurring under basic conditions using the Oxidation  Number method: IO31-(aq) + C2O42-(aq) → I1-(aq) + CO2(g)  b) Identify the oxidizing agent and the reducing agent. Give reasons for your choices.

The hydroperoxide ion, HO2–(aq), reacts with permanganate ion, MnO4–(aq) to produce MnO2(s) and oxygen gas. Balance the equation for the oxidation of hydroperoxide ion to O2(g) by permanganate ion in a basic solution.