Developing Metals 4: Electrochemical Series

Question 1

What does the electrochemical series show

Answer 1

What is reactive and what’s not

Question 2

Describe the standard electrode potentials for a more reactive METAL

Answer 2

Reactive metal = -ve standard electrode potential

Question 3

Describe the standard electrode potentials for a more reactive NON -METAL

Answer 3

Reactive non-metal = +ve standard electrode potential

Question 4

What does the anti-clockwise rule predict

Answer 4

Whether a reaction is likely to happen

Question 5

How does the anticlockwise roll sure you whether a reaction is likely to happen or not

Answer 5

Cell potential = E bottom - E top = +ve = reaction go to completion

Question 6

What factors would lead to the value of the E cell being wrong and not as expected

Answer 6

• conditions not standard ( ie conc not 1moldm-3 and temp not 298k )
• rate of reaction to slow
• reaction has a high activation energy

Question 7

What are the 7 steps that are required to determine the properties of half cells in a question

• refer to top ( more -ve E ) and bottom ( more +ve E ) equations

Answer 7

1. Direction ( loose ( top ) or gain ( bottom) electrons )
2. -ve( top ) or +ve ( bottom) electrode
3. Write half equation ( now single arrow not double )
4. Oxidation ( top= OIL ) or Reduction ( bottom = RIG )
5. Reducing agent ( top ) or Oxidising agent ( bottom )
6. Overall equation ( join to half equations = cancel our electrons )
7. Calculate E cell = E bottom - E top

Question 8

Be able to carry the 7 setups for any 2 half cell equation given along side there E values

Answer 8

??? Look at notes and pick out an example to do