conduction of electricity in salt and sugar solutions.

[Rita]

Hi All

Year 7 to do this prac. Using transformer and light to see difference in conduction in salt and sugar solutions.

Which electrodes would be best to use?

Thanks in advance
Rita

[smiley]

Well carbon is safest. Although I wouldn't use a transformer with Yr 7's. We use a simple battery circuit, with alligators, a mes (little light globe stand bizzo) and carbon electrodes. There are fairly simple conductivity rigs out there, using wire probes, that can work in a test tube, for example. There are even ones that use an LED instead of a globe.

The main issue is don't leave the electrodes in the solutions for very long, especially a salt solution, because you'll start making chlorine and poisoning the little cherubs. Unless, of course, you want....oh no, ahem, I mean, of course you don't want that to happen

[Ocker]

Good one Smiley!
Glad to see you are in top form!

[smiley]

Ahh Ocker, if only. But yes, they didn't irradiate my sense of humour, thankfully.

[Rita]

We have always used transformers with year 7.

Rita