M5S16 – Electrode Potentials 1

14

Electrode Potentials 1

1 / 10

What solution concentrations are required for the determination of a standard cell potential, Eϴcell/V?

2 / 10

What is the value of Eϴcell/V observed for a cell constructed from the following half-cells?

Mg2+(aq) + 2e- <=> Mg(s) Eϴcell/V = -2.37

Ag+(aq) + e- <=> Ag(s) Eϴcell/V = +0.80

3 / 10

Consider a cell constructed from the following half-cells:

Mg2+(aq) + 2e- <=> Mg(s) Eϴcell/V = -2.37

Ag+(aq) + e- <=> Ag(s) Eϴcell/V = +0.80

If the solution of Mg2+(aq) was 2.00 mol dm-3, would you expect to see a greater or smaller value of Eϴcell/V than you would if the cell was set-up under standard conditions?

4 / 10

Thinking carefully about the definitions of anode and cathode in electrochemical cells, an anode is defined as (CARE!):

5 / 10

What is the value of Eϴcell/V observed for a cell constructed from the following half-cells. These half-cells are those involved in Hydrogen Fuel Cells when set-up in alkaline conditions?

2H2O(l) + 2e- <=> 2OH-(aq)+ H2(g) (alkaline conditions) Eϴcell/V = -0.83

O2(g) + 2H2O(l) + 2e- <=> 4OH-(aq) (alkaline conditions) Eϴcell/V = +0.40

6 / 10

For this question, look at the resource, ‘A Selection of Standard Electrode Potentials’ (For this quiz, you will need to open or download the Data Sheet, ‘A Selection of Standard Electrode Potentials’. This can be found in TOOLS>Data Sheets)

Which chemical species is the most powerful reducing agent?

7 / 10

For this question, look at the resource, ‘A Selection of Standard Electrode Potentials’ (‘A Selection of Standard Electrode Potentials’can be found in TOOLS>Data Sheets)

Is Cu2+(aq) capable of oxidising Ag(s)?

8 / 10

For this question, look at the resource, ‘A Selection of Standard Electrode Potentials’ (‘A Selection of Standard Electrode Potentials’can be found in TOOLS>Data Sheets)

When pieces of tin (Sn) are added a yellow solution of acidified ammonium vanadate(V) containing the VO2+(aq) ion and the mixture allowed to stand for a few minutes, what colour will be observed in the solution?

9 / 10

Salt bridges are required for a cell Eϴcell/V to be measured.

What statement best describes the action of a salt bridge?

10 / 10

What is the value of Eϴcell/V observed for a cell constructed from the following half-cells?

V3+(aq) + e- <=> V2+(aq) Eϴcell/V = -0.26

VO2+(aq) + 2H+(aq) + e- <=> VO2+(aq) + H2O(l) Eϴcell/V = +1.00

 

Thank you for taking the quiz. Please fill in the fields below and you will receive your results in an email.

If you have been set this as homework, you should forward this email to your teacher as evidence you have completed the quiz.

If you don't receive your email please check your spam or junk folder.

Your score is

0%