Search found 200 matches
- 27 May 2024, 12:04
- Forum: Sourcing Materials & Eq Repairs
- Topic: Glass tubing
- Replies: 3
- Views: 20
Re: Glass tubing
We got some from Haines a while ago.
- 06 May 2024, 08:41
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 994
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: 8177
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: 8177
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: 8060
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: 3075
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: 3075
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: 8663
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: 4667
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: 20295
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: 8215
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: 10299
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: 28666
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: 5044
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: 4513
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: 4828
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: 5879
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: 5879
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: 5879
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: 5879
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...