[Catalist] Nanotechnology support for year 11 - colloidal gold

[Julia Ferguson]

AGAIN - GOOD ON YER SIR - YER BLOOD id worth bottling!
Cheers
Julia
-----Original Message-----
From: Catalist [mailto:catalist-bounces at lists.stawa.net] On Behalf Of Leon Harris
Sent: Sunday, 10 January 2016 12:09 PM
To: catalist at lists.stawa.net
Subject: [Catalist] Nanotechnology support for year 11 - colloidal gold

Greetings to one and all. Hope you have had a restful holiday.
One weakness of the Nanotechnology section of Year 11 Chemistry is that it is very weak on lab components.
To help support this aspect of the course, I have designed and researched a cheap practical demonstrating colloidal gold and some of its properties. There is a nice canned prelab of calculations, and the whole thing should take 25 to 30 minutes of class time to perform (10 minutes to complete the doing part of the actual experiment). The key advantage of this lab is that I have found a cheap source of reagents for it, and the reagent cost per class group to perform is something like $1.60 to $2. I was proud of that. It is robust, works great in my shed, and a rich learning experience (the colours are divine)!

If you would like a copy of this, please email me off list. (It is against policy to send attachments, I'm afraid, and I don't want to unintentionally annoy any non-chemists on our list.

Cheers,
Leon



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