Please provide detail on how answers are derived!! (and Thank you, thank you thank you!!!)
1. IO3 (aq) + SO2(g) –> I2(s) + SO42-(aq) Balance this redox reaction in an acidic medium
2. NO2-(aq) + AL(s) –> NH3(g) + AlO2- Balance this redox reaction in a basic medium
3. In an electrolysis experiment, a student passed 1.57 A of current through an aqueous solution of lead (II) nitrate containing a 7.63 g. piece of lead foil as the cathode. What is the final mass of the lead electrode after 17 minutes?