a. Molar conductivity of substance “A” is 5.9×10 3 S/m and “B” is 1 x 10 -16 S/m. Which of the two is most likely to be copper metal and why?
b. What is the quantity of electricity in Coulombs required to produce 4.8 g of Mg from molten MgCl 2 ? How much Ca will be produced if the same amount of electricity was passed through molten CaCl 2 ? (Atomic mass of Mg = 24 u, atomic mass of Ca = 40 u).
c. What is the standard free energy change for the following reaction at room temperature? Is the reaction spontaneous?
Sn(s) + 2Cu 2+ (aq) à Sn 2+ (aq) + 2Cu + (s)