Module 5: Electrochemistry And Electrochemical Cells

Question 1

Define anode

Answer 1

Electrode where oxidation occurs

An ox

Question 2

Define cathode

Answer 2

Electrode where reduction occurs

Red cat

Question 3

Define galvanic electrochemical cell

Answer 3

Cell based on spontaneous redox reaction

Produces energy

Question 4

Define electrolytic electrochemical cell

Answer 4

Based on non spontaneous redox reaction

Consumes energy

Question 5

Cell notation

Answer 5

Anode || cathode

Question 6

What is the function of the salt bridge

Answer 6

Prevents charge build up in the solutions

Question 7

Define cell potential

Answer 7

Electrical work divided by charge transferred

Question 8

What does E depend on

Answer 8

Oxidizing or reducing strength of each half cell

Conditions under which the cell operates

Question 9

What happens to E if reaction is reversed

Answer 9

Changes sign

Question 10

What happens to E if half reaction multiplied by n

Answer 10

Nothing

Question 11

What happens to E when two half reactions are added together

Answer 11

We add the Es of each half reaction

Question 12

How does sign of E affect things

Answer 12

> 0 spontaneous

<0 not spontaneous (like entropy)

Question 13

Define oxidizing agent

Answer 13

Causes smth else to be oxidized

Aka something easily reduced

Question 14

Define reducing agent

Answer 14

Causes something else to be reduced

Something easily oxidized

Question 15

What happens to E as Q increases

Answer 15

E decreases

Question 16

At equilibrium, what are E and Q

Answer 16

E = 0
Q = K