Search found 199 matches
- 06 May 2024, 08:41
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 374
Re: Is this Cornflower ?
I doubt it's "cornflower". It may, however, be cornflour.
- 02 Apr 2024, 10:29
- Forum: Sourcing Materials & Eq Repairs
- Topic: pipette racks to give away
- Replies: 4
- Views: 5807
Re: pipette racks to give away
Oh they're for glass pipettes. Not for me then. Thanks anyway - and good to see you didn't just chuck them in the bin.
- 02 Apr 2024, 07:08
- Forum: Sourcing Materials & Eq Repairs
- Topic: pipette racks to give away
- Replies: 4
- Views: 5807
Re: pipette racks to give away
Are they for micropipettes? Sorry I can't open the attachment. Would love a few if so. Happy to pay postage.
- 20 Mar 2024, 11:50
- Forum: Recipes and Pracs
- Topic: Help please - High conc. CuSO4 / Cu(NO3)2 solutions
- Replies: 6
- Views: 5706
Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions
What did you end up using?
- 06 Feb 2024, 10:36
- Forum: Recipes and Pracs
- Topic: colour change when heated
- Replies: 7
- Views: 2238
Re: colour change when heated
Zinc oxide changes colour at around 8000 degrees Celsius, so if you can get that organised I'd be most impressed.
- 06 Feb 2024, 10:34
- Forum: Recipes and Pracs
- Topic: colour change when heated
- Replies: 7
- Views: 2238
Re: colour change when heated
Used silica gel will change colour on heating. Hydrated CuSO4 will turn from blue to white on heating due to water loss. I can't think of something that will change back on cooling apart from thermochromic dyes which I'm pretty sure schools don't usually have on hand. Good luck!
- 05 Feb 2024, 12:50
- Forum: Chemistry and Labware - General
- Topic: CuSO4
- Replies: 19
- Views: 7611
Re: CuSO4
From "The Laboratory". Dissolve 27.8g of iron(II) sulphate in distilled water containing 15mL of 0.1M H2SO4 and make up to 1L. This will give you a strength of 0.1M iron sulphate. Obviously just change the amount of iron sulphate for a different strength.
- 31 Oct 2023, 11:20
- Forum: Biology, Physics...
- Topic: microscopes
- Replies: 2
- Views: 3969
Re: microscopes
The gadget repair man we use reckons Motic are the best.
- 17 Oct 2023, 09:27
- Forum: Sourcing Materials & Eq Repairs
- Topic: Eyes for dissection
- Replies: 28
- Views: 18829
Re: Eyes for dissection
We got eyes from the abattoir delivered to our local butcher earlier this year. $5 freight. It sounds like we're lucky in that regard. Can't get fresh brains anymore though - we had to get preserved brains from Southern Biological.
- 11 Oct 2023, 09:51
- Forum: Recipes and Pracs
- Topic: Iodine Clock Reaction
- Replies: 6
- Views: 7441
Re: Iodine Clock Reaction
Here's one that uses H2O2. Using stronger H2O2 results in a faster reaction. https://edu.rsc.org/experiments/iodine- ... 44.article
- 07 Sep 2023, 12:13
- Forum: Safety with Chemicals
- Topic: Yellowcake found at a school!
- Replies: 0
- Views: 8079
Yellowcake found at a school!
Check this out https://www.theguardian.com/australia-n ... dney-found
Some poor new labbie must have nearly had a heart attack.
Some poor new labbie must have nearly had a heart attack.
- 05 Sep 2023, 13:20
- Forum: Chemistry and Labware - General
- Topic: Water purifier - deioniser etc
- Replies: 35
- Views: 26865
Re: Water purifier - deioniser etc
We bought a distiller from the brewery shop, and it's more than paid for itself. Plus no packaging or plastic bottles or effort. Occasionally I rinse it with 5M HCl to descale it. 4L per cycle and auto -off. pH is quite low of course, but that doesn't really matter for our purposes.
- 04 Sep 2023, 13:24
- Forum: Safety with Chemicals
- Topic: empty bottle disposal
- Replies: 3
- Views: 4302
Re: empty bottle disposal
They are recyclable. I keep mine for solution bottles.
- 30 Aug 2023, 07:52
- Forum: Biology, Physics...
- Topic: seedlings for terrariums
- Replies: 1
- Views: 3760
Re: seedlings for terrariums
It depends on what they want to do with the terrarium - will there be animals in there? This from google: https://www.google.com/search?q=terrarium+plants&rlz=1C1GCEU_enAU886AU886&oq=terrerium&aqs=chrome.2.69i57j0i10i433i512l3j0i10i512l6.8942j0j7&sourceid=chrome&ie=UTF-8&safe...
- 29 Aug 2023, 08:58
- Forum: Chemistry and Labware - General
- Topic: Chemical disposal
- Replies: 3
- Views: 4047
Re: Chemical disposal
Wow. Dodgy as! Lucky you were onto them.
- 14 Aug 2023, 12:20
- Forum: Safety with Chemicals
- Topic: Gas syringe explosion
- Replies: 7
- Views: 5008
Re: Gas syringe explosion
Totally. It was insane. Upside - no one got badly hurt and the kids love a good explosion. Downside - we were all shocked and went home thanking the gods of science for their mercy.
- 14 Aug 2023, 11:58
- Forum: Safety with Chemicals
- Topic: Gas syringe explosion
- Replies: 7
- Views: 5008
Re: Gas syringe explosion
Yeah we had them in those clamps meant to stop the plunger coming out - the explosion bent the clamp! It was seriously full on.
- 14 Aug 2023, 11:10
- Forum: Safety with Chemicals
- Topic: Gas syringe explosion
- Replies: 7
- Views: 5008
Re: Gas syringe explosion
Yes all ok, luckily. One kid had a bit of glass in his leg but it was pretty minor compared to how it could have been. The teacher was horrified and did most of the clean-up himself!
- 14 Aug 2023, 10:10
- Forum: Safety with Chemicals
- Topic: Gas syringe explosion
- Replies: 7
- Views: 5008
Gas syringe explosion
Clamped gas syringe connected to a clamped side-arm test tube with stopper. Reaction of 2M HCl and magnesium ribbon, measuring the amount of gas released when varying the amount of Mg. Teacher decides to do a pop test with around 60mL of H2 in the syringe. Syringe plunger is propelled at great speed...
- 09 Aug 2023, 12:50
- Forum: Safety with Chemicals
- Topic: Environmental friendly Disposable Gloves?
- Replies: 20
- Views: 7782
Re: Environmental friendly Disposable Gloves?
I've been saving up our gloves coz the head teacher said "Wait and see" re the recycling box. If there's money left over towards the end of the year, we'll get it. The gloves take up hardly any room, too. In the future I will only buy the biodegradable gloves from Haines. I emailed them a ...