Australia's Science Forum

We're in the market for a new ripple tank. Has anyone bought one recently? Any recommendations?

Cheers
Liz

I put a few drops of Universal Indicator in the water and freeze. It's not blue, but it doesn't settle out like food colouring.

Mine plays up every now and then, after I spent a ridiculous amount of time cleaning it up!! I sometimes still get the multiple suppliers thing even when I've selected the right supplier. I'm on record (a broken one, at that) as calling Chemwatch a huge pain in the proverbial and completely unsuited...

We have the Bluegel ones which we run with dyes and home-made buffered agar and they work well.
Liz

We have a couple (with many more on my wishlist) and are very happy with them; they're easy to use and the app is straight-forward.
Liz

That would be a HUGE thumbs down from me!!

It's the same as it's always been....why would it be different now?
We only sample fomites or water and the plates are not opened after incubation.
Cheers

I try to limit the use of metals by encouraging mico-chemistry (I'm not always successful!) and we we don't use any lead salts at all; I recently banned potassium permanganate because it's so hard to dispose of. I don't put anything down the sink and discourage students from doing so (again, not alw...

I just spoke to the principal about this and she signed on the spot.
(Helps that she's a science teacher, I think).
Cheers

Yes, Shelley, I've bought those and their neodymium magnets; both are good quality and value.

I've bought from AMF and the magnets are great.....and their customer service is excellent!
Liz

Re: nitrogen dioxide & dinitrogen tetroxide Post by Loopy » Fri Oct 19, 2018 9:55 am Hi all, I got 1 pair of NO2/N2O4 tubes for equilibrium from a place in WA. In 2014 they cost $134 + freight. The tubes are about 14cm long. Am I allowed to post the company's information for this specialist item? Or...

This resource from Science Assist is invaluable!
Also, welcome to labbie land!!
https://assist.asta.edu.au/sites/assist ... ition3.pdf

Another way is to strain yoghurt through muslin and collect the whey. I do it at home so I can eat the resulting curd....make good labne!

Gelatine?

Investigating an Equilibrium Reaction.docx

Here's the one we did for that topic - worked well and no fluoride.

RiskAssess has the solid as Yr11/12 but solutions as Yr 7-12.
I think it was part of a prac in the old chem curriculum??

You could try Mohrs salt?
https://www.youtube.com/watch?v=RDeIUroQ4Eo
Cheers

Those look amazing! What are the dimensions? Could you fit a tiny beaker on the weighing pan?
Liz

This was interesting....I know it's British, but lots of points are relevant to us, too.


https://eic.rsc.org/analysis/what-techn ... 86.article