Equilibrium Electrochemistry

Question 1

Electrochemical potential

Answer 1

Chemical potential and electrostatic potential

Question 2

Electrolyte

Answer 2

Ions in solution

Question 3

Anode

Answer 3

Oxidation, supplies electrons to circuit

Question 4

Cathode

Answer 4

Reduction, more negative

Question 5

Salt bridge

Answer 5

While electrons flow from anode to cathode anions and cations flow through salt bridge in opposite directions to help maintain balance

Question 6

Galvanic cell

Answer 6

Produces electricity as result of spontaneous reaction happening inside

Question 7

Electrolytic cell

Answer 7

Non-spontaneous reaction driven by external DC source

Question 8

Daniell cell

Answer 8

Copper electrode with copper sulfate solution and zinc electrode with zinc sulfate solution

Question 9

Ecell > 0

Answer 9

K > 1 so products favoured

Question 10

Ecell < 0

Answer 10

K < 1 so reactants favoured

Question 11

SHE

Answer 11

Standard potential defined as 0 and provides reference for all other standard potentials of half reaction

Question 12

Standard potentials

Answer 12

Added up similar to Hess’s law so must take stoichiometry into account, overall no of electrons needs to be balanced

Question 13

Ecell > 0

Answer 13

Spontaneous