Search found 557 matches
- 05 Dec 2014, 08:43
- Forum: Safety with Chemicals
- Topic: Nitrates
- Replies: 11
- Views: 4763
Re: Nitrates
You know, I kept all of our old desiccators in the storeroom because I had room, but not because I use them. But maybe we should use them to store the hydroscopic chemicals. I have thrown out quite a few jars of Red Phosphorous because try as I might I couldn't stop it turning to liquid. But when I ...
- 05 Dec 2014, 08:31
- Forum: Chemistry and Labware - General
- Topic: Setting up yet another prep room
- Replies: 16
- Views: 6651
Re: Setting up yet another prep room
Oh Sue that's an impossible situation. Your head teacher really must jump up and down to the boss. It used to be up to the SAM here for SAS allocations but the last few principals have the say. We are about to get shafted in Science because we are not in the principal's ear, and I am trying to rev u...
- 06 Nov 2014, 14:18
- Forum: Safety with Chemicals
- Topic: chemwatch labels
- Replies: 26
- Views: 10600
Re: chemwatch labels
Thanks Superbug
- 06 Nov 2014, 13:21
- Forum: Safety with Chemicals
- Topic: chemwatch labels
- Replies: 26
- Views: 10600
Re: chemwatch labels
I thought I would have a look at the Dgen labels, but I must have a totally different screen because it isn't there. When I log on to Chemwatch, it comes up as Chemgold III. Can't see Dgen at all.
- 06 Nov 2014, 11:45
- Forum: Recipes and Pracs
- Topic: Making Phenol red solution
- Replies: 5
- Views: 3766
Re: Making Phenol red solution
The recipe I have is 0.5g dissolved in 500ml distilled water.
- 06 Nov 2014, 11:40
- Forum: Sourcing Materials & Eq Repairs
- Topic: Year 12 Forensic Chemistry
- Replies: 10
- Views: 5294
Re: Year 12 Forensic Chemistry
We make our own electrophoresis prac stuff. Nothing expensive: just need some agar to make the gel; a clear take away container to set gel in; food colouring; couple of graphite rods, shaped to fit together in a sort of cross with a rubber band; salt for the electrolyte solution; aligator clip leads...
- 30 Oct 2014, 08:47
- Forum: Safety with Chemicals
- Topic: chemwatch labels
- Replies: 26
- Views: 10600
Re: chemwatch labels
I'm with fibreweb. I ended up designing my own labels, using chemwatch and importing into a template on Word. But I'm not going to change anything till the department says so and what they want. No-one ever checked what I'd done or even commented, so until there are CLEAR instructions (which I don't...
- 21 Oct 2014, 14:19
- Forum: Safety with Chemicals
- Topic: Chemwatch for NSW govt schools
- Replies: 43
- Views: 16206
Chemwatch for NSW govt schools
I have managed to log on to Chemgold 3, but when trying to do a search for MSDS or labels, it just spins and get no reults. Is anyone else (particularly in Govt schools) having this problem? Is there any advice to what is happening with chemwatch? I've no idea what we are supposed to do in the meant...
- 11 Sep 2014, 15:35
- Forum: Announcements
- Topic: Re: GOODBYE
- Replies: 6
- Views: 3661
Re: GOODBYE
Just tried to get on to Chemwatch the usual way and it has already gone.
- 04 Sep 2014, 12:31
- Forum: Chemistry and Labware - General
- Topic: Penolphthalein Agar Prac
- Replies: 11
- Views: 5716
Re: Penolphthalein Agar Prac
May I just add,I found that it does work best if you let the Agar cool down to 60deg C before adding the NaOH and phenolphthalein.
- 01 Sep 2014, 10:00
- Forum: Recipes and Pracs
- Topic: Recipe for microwave agar
- Replies: 10
- Views: 5074
Re: Recipe for microwave agar
I just boil the kettle, it is even easier for me, as the microwave has to be in another room here.
- 01 Sep 2014, 09:54
- Forum: Recipes and Pracs
- Topic: Starch - negative test
- Replies: 3
- Views: 2592
Re: Starch - negative test
This may be too late, but if you mean another indicator, you could use anything from Alizarin Yellow thru to Universal Indicator. I was thinking of Methyl Orange but I haven't tried it, but I doubt if any of them would react.
- 25 Aug 2014, 09:01
- Forum: Chemistry and Labware - General
- Topic: Penolphthalein Agar Prac
- Replies: 11
- Views: 5716
Re: Penolphthalein Agar Prac
No, only year 11 Bio, for 22 years
- 11 Aug 2014, 11:56
- Forum: Safety with Chemicals
- Topic: Nitric acid where do you store it?
- Replies: 20
- Views: 9456
Re: Nitric acid where do you store it?
Acetic acid doesn't seem to be very friendly at all. You can't store it near alcohols, nor near Nitric acid. As our acids are on shelves in an open acid bay, I have got acetic acid on a separate shelf to the Nitric acid. The flammables (alcohols) are in a cupboard so the fumes congregate a bit, so I...
- 11 Aug 2014, 11:48
- Forum: Recipes and Pracs
- Topic: Man Dingo Experiment
- Replies: 8
- Views: 4362
Re: Man Dingo Experiment
Haha... I've only ever heard this referred to as the elephant poo experiment.
- 04 Aug 2014, 10:40
- Forum: Recipes and Pracs
- Topic: Making Gold Nanoparticles
- Replies: 8
- Views: 4978
Re: Making Gold Nanoparticles
It seems to be available in the US at a cost prohibitive to most schools. Sigma Aldrich. But couldn't easily see a vendor here.
- 04 Aug 2014, 10:33
- Forum: Recipes and Pracs
- Topic: Making Gold Nanoparticles
- Replies: 8
- Views: 4978
Re: Making Gold Nanoparticles
When it is too hard to find the stuff teachers want, ask "what part of the syllabus/curriculum is that in". It may well be a cool experiement, but is it necessary for a high school?
BTW I couldn't find it in Chemwatch or Serrata either.
BTW I couldn't find it in Chemwatch or Serrata either.
- 24 Jun 2014, 13:26
- Forum: Recipes and Pracs
- Topic: agar 750 or agar 1000
- Replies: 26
- Views: 9694
Re: agar 750 or agar 1000
Would they mean grams as in 750g and 1000g?
- 18 Jun 2014, 15:01
- Forum: Chemistry and Labware - General
- Topic: GHS and Labels
- Replies: 22
- Views: 9627
Re: GHS and Labels
Thanks superbug. Totally different screen, no wonder I couldn't find it. Will still hunt around to see if it is hiding somewhere.
- 18 Jun 2014, 14:09
- Forum: Chemistry and Labware - General
- Topic: GHS and Labels
- Replies: 22
- Views: 9627
Re: GHS and Labels
Well... I can't even get to first base. Maybe I have a different screen to you, but I can't find a a-z icon or house anywhere. I just realised we are on Chemgold III, not Chemwatch. I thought they were the same thing. Well they are the same company, aren't they?