Here are the details recently covered in Mrs Read's lessons. Separate Science 2023. 

The content is common to Trilogy, some content is not required by FT.

If you have missed this topic, please work through the tasks below.

We started with a revision of ionic bonding

6.1 Introduction to Electrolysis

Electrolysis the breaking down of an ionic compound using electricity to form elements.

(1) Watch this clip:

(2) Read your textbook. Separate Science Pages 102-3, Trilogy Pages 86-87.

(3) In the lesson, I showed a demonstration for the two practicals shown on the page.

(4) Work through the first section of the learning grid 

6.2 Changes at the Electrodes

(5) Watch this clip

(6) Read pages 104-5 in your textbook (separate) or 88-89 (trilogy), and then 108-109 (or 90-91).

(7) Fill in the second and fourth sections of the learning grid 

6.4 Electrolysis of Aqueous solutions and brine.

(8) We watched this clip to get an idea of how this process has to occur in industry. You are not expected to recall any of the details. The clip begins at 25 seconds.

(9) We then worked on the questions on Electrolysis 2.

Please correct your work using the markscheme above :)

6.3 Electrolysis of aluminium

(10) We talked about the challenges of electrolysising aluminium oxide. 

It has such a high melting point because of the 3+ and 2- ions in the lattice. Melting it requires a temperature of over 2000 oC. So instead we need to use cryolite, another ionic substances which melts closer to 850 oC (used to be 950 but is is more efficient now).

 (11) We watched this clip first

(12) And then this clip second.

(13) We filled in the third section of the learning grid.

(14) Lastly we worked through the questions on Electrolysis 1.

We plan to go through our answers in the lesson on Wed 10th May using the markscheme :)