1. write the numbers for a,b,c and d (in this order) required to balance the reaction below. Be sure to enter a "1" if there is only one of any specie. 6 H+(aq) + a As2O3(aq) + b In(s) c As(s) + d In3+(aq) + 3 H2O(l) 2. A student wanted to plate a nail with silver. She placed both the nail and a silver bar in a container filled with an electrolyte and then connected them to a direct current power supply. The diagram above shows her equipment. In order to plate the nail with silver, the nail must be Select one: the cathode and connected to the negative side of the power supply. the cathode and connected to the positive side of the power supply. the anode and connected to the negative side of the power supply. the anode and connected to the positive side of the power supply. 3. Chrome plating puts a thin layer of chromium metal on another metal. This is done by reducing chromium (III) ions in a chrome plating vat. What is the half-reaction for the reduction of chromium (III) in a chrome plating vat? Select one: Cr4+(aq) + e- Cr3+(aq) Cr3+(aq) Cr4+(aq) + e- Cr(s) Cr3+(aq) + e- Cr3+(aq) + 3 e- Cr(s) 4. Which example below shows the oxidation of iron? An iron bolt is difficult to remove because it is rusty. An iron smelter converts iron ore (iron oxide) into metal. Iron nails are galvanized by plating them with zinc. Iron plates can be joined by welding.