Wednesday, 30 July 2014

Practical Electrochemistry

Today, we made some half-cells and combined them with a salt-bridge and a voltmeter. Then, we were asked to make sense of our observations.

Tuesday, 29 July 2014

Standard Electrode Potentials and EMF

This is a big idea and we will spend the rest of the week exploring it:

  1. What are standard electrode potentials?
  2. How are they used to find the EMF of a cell?
  3. What happens if a cell has a negative EMF?
  4. How can EMF be used to predict what would be observed in a redox reaction?
  5. How can standard electrode potentials be used to rank oxidant- and reductant-strength?

Friday, 25 July 2014

Electrochemical Cells - Introduction

We started the lesson by making an electrochemical cell using zinc chloride, a zinc electrode, copper (II) sulfate, a copper electrode. We found that this generated about 1.4V

Thursday, 24 July 2014


Electricity can be used to split compounds up into their elements. This is an example of oxidation-reduction.

Wednesday, 2 July 2014

Balancing Redox Half Equations

Another recap of Level 2 work...

Thanks to Sam for finding these FLASH CARDS
Logan found these FLASH CARDS which are also excellent.

Tuesday, 1 July 2014

Oxidation Numbers

This is just a recap of last year's work. We discussed the allocation of oxidation numbers: