Search found 557 matches

by dime
05 Dec 2014, 08:43
Forum: Safety with Chemicals
Topic: Nitrates
Replies: 11
Views: 2507

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 ...
by dime
05 Dec 2014, 08:31
Forum: Chemistry and Labware - General
Topic: Setting up yet another prep room
Replies: 16
Views: 3298

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...
by dime
06 Nov 2014, 14:18
Forum: Safety with Chemicals
Topic: chemwatch labels
Replies: 26
Views: 4970

Re: chemwatch labels

Thanks Superbug
by dime
06 Nov 2014, 13:21
Forum: Safety with Chemicals
Topic: chemwatch labels
Replies: 26
Views: 4970

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. :-(
by dime
06 Nov 2014, 11:45
Forum: Recipes and Pracs
Topic: Making Phenol red solution
Replies: 5
Views: 1991

Re: Making Phenol red solution

The recipe I have is 0.5g dissolved in 500ml distilled water.
by dime
06 Nov 2014, 11:40
Forum: Sourcing Materials & Eq Repairs
Topic: Year 12 Forensic Chemistry
Replies: 10
Views: 2469

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...
by dime
30 Oct 2014, 08:47
Forum: Safety with Chemicals
Topic: chemwatch labels
Replies: 26
Views: 4970

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...
by dime
21 Oct 2014, 14:19
Forum: Safety with Chemicals
Topic: Chemwatch for NSW govt schools
Replies: 43
Views: 7508

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...
by dime
11 Sep 2014, 15:35
Forum: Announcements
Topic: Re: GOODBYE
Replies: 6
Views: 1842

Re: GOODBYE

Just tried to get on to Chemwatch the usual way and it has already gone.
by dime
04 Sep 2014, 12:31
Forum: Chemistry and Labware - General
Topic: Penolphthalein Agar Prac
Replies: 11
Views: 2743

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. :D
by dime
01 Sep 2014, 10:00
Forum: Recipes and Pracs
Topic: Recipe for microwave agar
Replies: 10
Views: 2465

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.
by dime
01 Sep 2014, 09:54
Forum: Recipes and Pracs
Topic: Starch - negative test
Replies: 3
Views: 1337

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.
by dime
25 Aug 2014, 09:01
Forum: Chemistry and Labware - General
Topic: Penolphthalein Agar Prac
Replies: 11
Views: 2743

Re: Penolphthalein Agar Prac

No, only year 11 Bio, for 22 years
by dime
11 Aug 2014, 11:56
Forum: Safety with Chemicals
Topic: Nitric acid where do you store it?
Replies: 20
Views: 4066

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...
by dime
11 Aug 2014, 11:48
Forum: Recipes and Pracs
Topic: Man Dingo Experiment
Replies: 8
Views: 2065

Re: Man Dingo Experiment

Haha... I've only ever heard this referred to as the elephant poo experiment. :D
by dime
04 Aug 2014, 10:40
Forum: Recipes and Pracs
Topic: Making Gold Nanoparticles
Replies: 8
Views: 2369

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.
by dime
04 Aug 2014, 10:33
Forum: Recipes and Pracs
Topic: Making Gold Nanoparticles
Replies: 8
Views: 2369

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.
by dime
24 Jun 2014, 13:26
Forum: Recipes and Pracs
Topic: agar 750 or agar 1000
Replies: 26
Views: 4765

Re: agar 750 or agar 1000

Would they mean grams as in 750g and 1000g?
by dime
18 Jun 2014, 15:01
Forum: Chemistry and Labware - General
Topic: GHS and Labels
Replies: 22
Views: 4436

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.
by dime
18 Jun 2014, 14:09
Forum: Chemistry and Labware - General
Topic: GHS and Labels
Replies: 22
Views: 4436

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? :?