(8) Write the balanced equation for the redox reaction.
To balance the redox reaction, the electrons must be balanced in both half reactions such that the electrons cancel when the half reactions are added. Multiplying the coefficients of equation (2) by 3 and the coefficients of equation (5) by 2 and then adding the half reactions yields
Equation (6) is the balanced redox reaction
(9) Determine the concentration of the original nitric acid solution.
The problem gives the information that 5g of solid copper exactly reduces 300 mL of solution. First, it is necessary to convert the mass of solid copper into moles. Then, using the mole ratio derived from equation (6), the original number of moles of nitrate ions can be determined.
