ELECTRODE POTENTIAL SME

Question 1

what is electrode potential?

Answer 1

• is a value which shows how easy a substance is reduced
• the more positive an electrode potential is, the more likely the species will undergo reduction

Question 2

what is the salt bridge

Answer 2

• completes the circuit
• allows ions to flow
• un reactive with solutions

Question 3

how do we do cell format

Answer 3

oxidation on left
reduction on right

different state? phase boundary

salt bridge with douvle lines

Question 4

what are standard conditions

Answer 4

298K
100kPa
ion conc of 1.00moldm^-3

Question 5

what is meant by standard electrode potential?

Answer 5

• the potential difference produced when a standard half-cell is connected to a standard hydrogen electrode under standard conditions

Question 6

what happens if an electrode isnt a metal?

Answer 6

• platinum electrode is used

Question 7

why is a platinum electrode used?

Answer 7

• inert and does not take part in reaction

Question 8

how do you calculate Ecell?

Answer 8

Erhs - Elhs
or

Ered - Eoxi

Question 9

how do we determine electron flow?

Answer 9

• look at Emf values
• species that will accept is LHS more positive
• species that donates is RHS negative