Australia's Science Forum

Hi
We are moving labs and giving away a large rock collection if anyone is interested please let me know.We are in North Sydney
Cheers Krysia

Hi Ian I asked the Science Assist folks this question last year and they have advised me that the use of 0.01M lead nitrate is okay. We use that concentration here and all works well. If you go to the Science Assist website you'll be able to find the answers to your question there is alot of informa...

Hello Labbies I'm attempting thin layer chromatography for the first time. I have made a slurry of 1g silica and 4 g plaster of paris and coated some microscope slides. I'm really not having much luck when I put it in the solvent, the synthetic indicator I'm supposed to use travels the entire length...

Hi Guys I have been asked to prepare the TLC plates. Does anyone know if it matters what type of Silica Gel you use. I ordered Silica Gel 60 from SSAPL because it said it was for chromatography. When it arrived it is labelled for flash chromatography. I rang and asked if it can be used for TLC and t...

We too make our chromatography ink, mixing red, yellow, green, blue food colouring to make black. We use filter paper, cut a strip from the centre of the circle to hang down into a beaker of water. Put a drop of ink on the centre of the circle, the water travels up the filter paper to the ink and br...

P.S. Bigmack I had a think and about the how much it makes and have decided I over did it and would say30- 40 puks. The snow pack thing you buy is a one off purchase and at around $350.00 is very expensive but worth it.So initial outlay is a lot but after that its not to bad. You can use dry ice for...

Hi Bigmack I purchased ours in April last year and it was $179.88 + GST and $30.99 for the CO2 fill. I think that's like a hire charge for the bottle. There is another place that you can buy the bottle outright and just the $30ish for the fill.Their bottle are more expensive but there no on going ch...

In Sydney you get a very similar form , I think its called Hydrilla, the aquarium called it native elodea that works really well if you. Obviously you get it from the aquarium, if you have on close by.

Hi Guys Your other option for dry ice is to purchase a CO2 cylinder ( we have DE size and food grade) and a snowpak gadget that screws on to the top of the cylinder. This allows you to make puks of dry ice that are about 5cm in diameter and 2 cm high,a cylinder makes a lot of puks, I'm gussing about...

Hi Noona and all chemtalkers,
I have moved schools and left the copy of this booklet, with instructions on how to embed specimens at my last school. Is there any chance of getting another copy from anybody who may still have it.
Cheers
Krysia

Hi Merrilyn

I hope I'm not to late, but can grab a copy of the booklet as well please.
email is clee@brigidine.nsw.edu.au
Thanks in advance.
Krysia

Hi Everyone in labbie land! I have a teacher who would like to make geodes, may use eggs however she is keen to have a sort of homemade sandstone geode that we can fill with alum, she is hoping there will be a little leaching to show stalactite formation. I have tried making plaster of paris geode w...

I just pm'd you back but my computer is acting dumb and made me send it twice.

Hi Lada The location sounds perfect. Do you think they would consider making it a job share position? Would you consider doing it as a job share with me? I have just left Queenwood and that was an option that they were considering but I thought if I was studying this dip. ed. full time I wouldn't wa...

Hi Labbies I resigned my full time position last term and would now like to make myself available for any part time , casual relief work around the northern beaches. Does anyone know if there is a site that you can register on for this? Is here the best place place to look? I resigned to my Dip. Ed....

Yes I have been doing that for some time but for the last two days it doesn't move off that log in page. Are you able to get on?

Hi
Does anyone know what's happened to Chemwatch. I can't get on at all.
Krysia

Hi
YAYYY I just made the algal balls. Now I'm wondering if others have made them and kept them for use at a later date? If so how did you store them. In a solution, wrapped in glad wrap? Any ideas would be most appreciated.

Hi Guys

Does anyone what safety signs in the lab that they were checking for?

Hi WE are having our inspection in a couple of weeks and after reading this thread I'm wondering if I should have the bottles of chemicals in powdered form in trays on the shelves they are on. At the moment they are just on the shelves. Solutions are all in trays. Also when you say they checked safe...