Thanks! I've just ordered one
Search found 419 matches
- 11 Sep 2023, 12:27
- Forum: Chemistry and Labware - General
- Topic: Water purifier - deioniser etc
- Replies: 35
- Views: 25347
- 05 Sep 2023, 14:45
- Forum: Chemistry and Labware - General
- Topic: Water purifier - deioniser etc
- Replies: 35
- Views: 25347
Re: Water purifier - deioniser etc
Is that 2L or 4L? Ours was all stored in 2L bottles that originally had Coles deionised water in them. I have been here over 2.5 years and the water is still good. I used to have a 20L distilled water drum at my old school that I just kept filling up. We had purchased it during the drought before in...
- 05 Sep 2023, 13:07
- Forum: Chemistry and Labware - General
- Topic: Water purifier - deioniser etc
- Replies: 35
- Views: 25347
Re: Water purifier - deioniser etc
I had a 4L one at my previous school. I don't remember where I got it from but it worked really well and I don't remember changing the filters either! From memory, it did need a wipe out after each distillation as the base is where most of the gunk seemed to end up. I've just had a quick look online...
- 04 Sep 2023, 12:47
- Forum: Safety with Chemicals
- Topic: empty bottle disposal
- Replies: 3
- Views: 3534
empty bottle disposal
I feel like this is an "I should know this already" question, but what do you do with your empty concentrated acid bottles? I have 2x 32% HCl bottles (plastic) that the acid came in and I have decanted it into winchesters. I have rinsed and dried the bottles a few times. Do you just throw ...
- 29 Aug 2023, 11:37
- Forum: Biology, Physics...
- Topic: seedlings for terrariums
- Replies: 1
- Views: 3098
seedlings for terrariums
I am not much of a botanist so I am hoping one of you can let me know what sort of seedlings I should buy for yr 7 students to make a terrarium! Have any of you done this? I did a search on here and didn't come up with anything. It's from Core Science 4.
- 22 Aug 2023, 09:20
- Forum: Jobs Forum
- Topic: Mat leave cover for 2024
- Replies: 4
- Views: 9073
Re: Mat leave cover for 2024
Congratulations! That sounds like a very big and busy school to have 1x part time and 2x full time labbies! I can't even imagine it from my small school with a graduating yr12 class of 6 students!!
- 14 Aug 2023, 10:31
- Forum: Safety with Chemicals
- Topic: Gas syringe explosion
- Replies: 7
- Views: 4145
Re: Gas syringe explosion
Oh my goodness!!! Are you all ok? That would have been such a fright! I hope the teacher and student teacher stuck around and helped with the clean up. So lucky no one was in the way of the plunger!
- 08 Aug 2023, 12:12
- Forum: Sourcing Materials & Eq Repairs
- Topic: pinecone substitute
- Replies: 6
- Views: 3779
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! Yeah it does look like fun. Our school is prep-12 so I've just asked the primary teachers if any of them have any pine cones stashed away in their store rooms for art/craft. The teacher said it...
- 08 Aug 2023, 10:35
- Forum: Sourcing Materials & Eq Repairs
- Topic: pinecone substitute
- Replies: 6
- Views: 3779
pinecone substitute
A teacher wants to do a plant prac with placing one pinecone in water overnight and another in a warm, dry area overnight and then compare them. It is not pinecone season! I don't want to buy any... so do any of you have a recommendation for something else we could use that would offer the same/simi...
- 07 Aug 2023, 09:14
- Forum: Sourcing Materials & Eq Repairs
- Topic: refraction semi circles
- Replies: 5
- Views: 3630
Re: refraction semi circles
I ended up getting some from Mad About Science. They are being used in a prac exam in a couple of weeks so hopefully they will continue to use them for future years!
- 07 Aug 2023, 09:11
- Forum: Chemistry and Labware - General
- Topic: Year 10 DNA Pracs.
- Replies: 24
- Views: 13404
Re: Year 10 DNA Pracs.
I wash and reuse zip lock bags all the time. Eventually they do have to go in the bin, sadly. Fortunately there are now some excellent compostable bags available. (Thankfully, my head teacher would never instruct me to not reuse something.) I find the regular ones don't even last the prac. Maybe ou...
- 04 Aug 2023, 12:48
- Forum: Sourcing Materials & Eq Repairs
- Topic: refraction semi circles
- Replies: 5
- Views: 3630
refraction semi circles
Help! Does anyone know where I can get these from? The teacher asked me about them a few weeks ago and I completely forgot to look them up and now I can't find them in Australia! I'm slowly going through the suppliers I can think of but if anyone has seen them lately I'd love to hear about it! https...
- 04 Aug 2023, 09:17
- Forum: Chemistry and Labware - General
- Topic: Year 10 DNA Pracs.
- Replies: 24
- Views: 13404
Re: Year 10 DNA Pracs.
In the interest of reducing plastic waste, has anyone tried the reusable zip lock bags for DNA extraction? I imagine that because they are a better quality plastic, the likelihood of breakages (loss of contents, starting again...) would be drastically reduced and actually make them worth the money a...
- 27 Jun 2023, 12:39
- Forum: Recipes and Pracs
- Topic: glucodin?
- Replies: 4
- Views: 2890
- 27 Jun 2023, 10:59
- Forum: Recipes and Pracs
- Topic: glucodin?
- Replies: 4
- Views: 2890
glucodin?
Does anyone use glucodin for glucose pracs? Does it do the same job as proper, supplier-bought glucose powder? Eg for osmosis? I'm trying to work out why the previous labbie had a stash of it and do I keep it or toss? It is still in date.
- 19 Jun 2023, 13:04
- Forum: Chemistry and Labware - General
- Topic: Using weight to find volume
- Replies: 3
- Views: 3178
Re: Using weight to find volume
I would imagine that for high school science either weight or volume would be accurate enough. This is where the % w/w or % w/v etc comes in. If you're weighing both it would be % w/w and if weighing the solid and measuring the liquid it would be % w/v. Mixing two liquids (eg Hcl) would be % v/v. Ha...
- 15 Jun 2023, 13:59
- Forum: Recipes and Pracs
- Topic: surface tension
- Replies: 1
- Views: 2928
surface tension
Has anyone tried the water drops on coins prac with play money instead of real money? Would it work? I should try it with my kids' play money but I never think of it at home! Just thought I'd ask on here in case someone else has already tried it.
- 06 Jun 2023, 11:43
- Forum: Safety with Chemicals
- Topic: Radioactive isotopes
- Replies: 17
- Views: 8762
Re: Radioactive isotopes
Where did the directive come from? I haven't seen or heard anything (private school, nsw). I just bought a new one this year!
- 06 Jun 2023, 10:22
- Forum: Biology, Physics...
- Topic: Disposal of used agar plates
- Replies: 33
- Views: 16502
Re: Disposal of used agar plates
Taken from Science Assist, Microwave ovens Microwave ovens are not a suitable alternative to an autoclave or laboratory pressure cooker as they do not provide moist heat in the form of steam under pressure and therefore, will not sterilise. Microwaves penetrate unevenly and there can be ‘hot spots’...
- 05 Jun 2023, 15:20
- Forum: Biology, Physics...
- Topic: Disposal of used agar plates
- Replies: 33
- Views: 16502
Re: Disposal of used agar plates
I think I'd better not use the microwave, as the Science staff use it for food. (it's in my prep room but they heat their lunch in it). The pressure cooker purchase has been rejected, and I have been told to do it in bleach. I will do it in a big tub in an out of bounds area where it can be left ov...