Lecture 8: Electrochemistry

Question 1

Oxidation states

Answer 1

1. The charge that would be on an atom is all of its bonds became ionic
2. Must add up to overall charge of atom

Question 2

Redox reactions

Answer 2

1. Any reaction where the oxidation state changes
   1a. Oxidized: lose electrons
   1b. Reduced: gains electrons

Question 3

Half reaction potential

Answer 3

1. The potentials for the oxidation half and the reduction half of a reaction can be approximated separately
2. Can’t be by itself: a reduction half reaction has to be paired w a oxidation half reaction

Question 4

Standard hydrogen electrode (SHE)

Answer 4

Chosen as an arbitrary 0 point