Answers for Practice Quiz (Electrolysis & Nuclear Chem)

1a) missing reactant is Curium-248

1b) products are Astatine-217 and an alpha particle

1c) products are Helium-3 and a beta particle

2) k = 1.05 x 10^(-4)  y^-1; 99% remains

3) 5.62 x 10^9  kJ/mole

4) Reduction at cathode: 2Zn²⁺(aq)  +  4e  à  Zn(s)

Oxidation at anode: 2H₂O(l)  à  O₂(g)  +  4H⁺(aq)  +  4e

Overall: 2Zn²⁺(aq)  +  2H₂O(l)  à  2Zn(s)  +  O₂(g)  + 4H⁺(aq)

 5) 12.7 g