Search found 218 matches
- 13 Mar 2024, 12:25
- Forum: Recipes and Pracs
- Topic: Help please - High conc. CuSO4 / Cu(NO3)2 solutions
- Replies: 6
- Views: 9428
Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions
I'm not sure you can make a 5M CuSO4....according to the bible (ie. The Laboratory) a saturated solution of CuSO4 is 22.3 g in 100 mL which is pretty close to 1M I think????
- 19 Feb 2024, 10:00
- Forum: Recipes and Pracs
- Topic: surface area to volume experiment
- Replies: 2
- Views: 3738
Re: surface area to volume experiment
Potato cubes in iodine....works really well. https://www.google.com/search?q=surface+are+to+volume+experiment+potato+and+iodine+solution&client=firefox-b-d&sca_esv=455241588eaade9a&ei=BJnSZc_CG7mUseMPi8iokAQ&oq=surface+are+to+volume+experiment+potato+and+iodine&gs_lp=Egxnd3Mtd2l6...
- 14 Nov 2023, 12:19
- Forum: Safety with Chemicals
- Topic: nickel sulfate
- Replies: 11
- Views: 16040
Re: nickel sulfate
I'd go with RiskAssess.....CSIS is jut too outdated and I'm glad I don't have to use it!
- 14 Sep 2023, 12:25
- Forum: Chemistry and Labware - General
- Topic: chemical register
- Replies: 14
- Views: 11478
- 28 Jun 2023, 13:32
- Forum: Chemistry and Labware - General
- Topic: A suitable demo?
- Replies: 10
- Views: 7800
Re: A suitable demo?
https://www.youtube.com/watch?v=9oYF-HxtoIt's
It's essentially the same as the demo we do here.....a small amount of the salt in a crucible lid with a small volume of ethanol lit with a long match.
Spectacular in a darkened room!
It's essentially the same as the demo we do here.....a small amount of the salt in a crucible lid with a small volume of ethanol lit with a long match.
Spectacular in a darkened room!
- 27 Jun 2023, 12:33
- Forum: Recipes and Pracs
- Topic: glucodin?
- Replies: 4
- Views: 5344
Re: glucodin?
Yep....we use it all the time and it works well.
- 22 Jun 2023, 11:27
- Forum: Miscellaneous
- Topic: Teachers
- Replies: 3
- Views: 6935
Re: Teachers
We do here, even for innocuous pracs, because it helps with scheduling etc.
Liz
Liz
- 08 Feb 2022, 11:34
- Forum: Recipes and Pracs
- Topic: effervescent tablets
- Replies: 4
- Views: 5244
Re: effervescent tablets
I bought Steradent tablets. I'm pretty sure that's what was recommended here.
Liz
Liz
- 18 Feb 2021, 12:23
- Forum: Forum Support Desk
- Topic: RIPPLE TANK
- Replies: 1
- Views: 6483
RIPPLE TANK
We're in the market for a new ripple tank. Has anyone bought one recently? Any recommendations?
Cheers
Liz
Cheers
Liz
- 10 Feb 2021, 08:28
- Forum: Recipes and Pracs
- Topic: freezing coloured water
- Replies: 18
- Views: 12569
Re: freezing coloured water
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.
- 08 Dec 2020, 08:13
- Forum: Miscellaneous
- Topic: Chemwatch have done it again
- Replies: 34
- Views: 29466
Re: Chemwatch have done it again
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...
- 02 Nov 2020, 08:13
- Forum: Chemistry and Labware - General
- Topic: Electrophoresis Kits
- Replies: 24
- Views: 17392
Re: Electrophoresis Kits
We have the Bluegel ones which we run with dyes and home-made buffered agar and they work well.
Liz
Liz
- 12 Oct 2020, 10:31
- Forum: Chemistry and Labware - General
- Topic: vernier go direct sensors feedback
- Replies: 3
- Views: 2922
Re: vernier go direct sensors feedback
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
Liz
- 20 Aug 2020, 13:09
- Forum: Chemistry and Labware - General
- Topic: Microbiology
- Replies: 9
- Views: 8206
Re: Microbiology
That would be a HUGE thumbs down from me!!
- 20 May 2020, 10:45
- Forum: Chemistry and Labware - General
- Topic: Microbiology
- Replies: 9
- Views: 8206
Re: Microbiology
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
We only sample fomites or water and the plates are not opened after incubation.
Cheers
- 12 Mar 2020, 11:53
- Forum: Safety with Chemicals
- Topic: Chemical waste bottles
- Replies: 22
- Views: 17431
Re: Chemical waste bottles
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...
- 06 Mar 2020, 09:34
- Forum: Sourcing Materials & Eq Repairs
- Topic: End User Declaration
- Replies: 47
- Views: 38620
Re: End User Declaration
I just spoke to the principal about this and she signed on the spot.
(Helps that she's a science teacher, I think).
Cheers
(Helps that she's a science teacher, I think).
Cheers
- 04 Feb 2020, 11:26
- Forum: Chemistry and Labware - General
- Topic: Magnets
- Replies: 12
- Views: 11097
Re: Magnets
Yes, Shelley, I've bought those and their neodymium magnets; both are good quality and value.
- 03 Feb 2020, 10:44
- Forum: Chemistry and Labware - General
- Topic: Magnets
- Replies: 12
- Views: 11097
Re: Magnets
I've bought from AMF and the magnets are great.....and their customer service is excellent!
Liz
Liz
- 23 Oct 2019, 08:58
- Forum: Chemistry and Labware - General
- Topic: nitrogen dioxide & dinitrogen tetroxide
- Replies: 14
- Views: 13976
Re: nitrogen dioxide & dinitrogen tetroxide
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...