Search found 196 matches
- 20 Mar 2024, 11:50
- Forum: Recipes and Pracs
- Topic: Help please - High conc. CuSO4 / Cu(NO3)2 solutions
- Replies: 5
- Views: 507
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: 450
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: 450
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: 5305
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: 1005
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: 12764
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: 4394
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: 1421
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: 20100
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: 1386
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: 1090
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: 984
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: 1352
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: 1352
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: 1352
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: 1352
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: 2731
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 ...
- 08 Aug 2023, 11:36
- Forum: Sourcing Materials & Eq Repairs
- Topic: pinecone substitute
- Replies: 6
- Views: 1205
Re: pinecone substitute
I know you said you didn't want to buy any, but Bunnings sell them.
- 08 Aug 2023, 11:33
- Forum: Sourcing Materials & Eq Repairs
- Topic: pinecone substitute
- Replies: 6
- Views: 1205
Re: pinecone substitute
I just looked on YouTube and it's cool! They open and close. No idea what else would do this - good luck!
- 08 Aug 2023, 11:28
- Forum: Sourcing Materials & Eq Repairs
- Topic: pinecone substitute
- Replies: 6
- Views: 1205
Re: pinecone substitute
What is the difference you are trying to show?