Australia's Science Forum

This is probably a really stupid question! but if you don't ask you'll never know.

Once Silver Chloride has oxidised is there anyway you can bring it back?

Thanks

I've attached mine if your interested can change around to suit, every time something is broken or replaced I change number, price etc., great for my replacement when I'm on long service leave, she can find everthing. Science staff go through Risk Assess so not helping themself, non-science have to ...

We are slowly replacing all ours with the blue plastic ones can go through the dish washer, haven't had an issue with hot test tubes, one lab has now had them for over 4 years. Yes I think there is a problem with years of chemical residue build up. There are a lot of chemicals student are not allowe...

Hi Brains trust,

Looking at purchasing owl pellets. However they are very expensive, considering it's a once only experience. Does anyone know of anything else that could be used with the same effect? That would meet all safety requirements (sterilised).

Thanks

Yes we did, they are going to give that old method above ago next year. Think just ended up speculating on what the results should have bwen.

Thanks

Hi Kimmy

Yep a real nightmare. This year, different teacher has tried a variation and is getting some results although not the higher readings that were sort.

Using 0.1M HNO3
0.5M KSCN
0.0001M Fe(NO3)3

0.0025M KSCN
0.0025M Fe(NO3)3

Hi Brains trust,

Person Chemistry 12 prac.5.4

Is anyone having a win doing this practical? This is the second year we are having no luck with results.

Thanks in advance

Loopy wrote: ↑19 Oct 2018, 09:55 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? Or I can pm the info to anyone interested.

Yes please!

astagni wrote: ↑24 Sep 2019, 14:42 Thanks Macca, what microscope did you end up going with?

Sorry been a bit distracted lol Prism Optical. Bit expensive but we haven't bought new senior microscopes in over 20 years hopefully they'll last another 20 yrs.


Happy holidays everyone! 2 days and counting.

We bought expensive microscopes then purchased Smartphone (universal) adapters from china (AliExpress) around $5 each they work brilliantly can then enlarge even further.

macca wrote: ↑30 Jan 2019, 08:20 Morning everyone, Hoping someone can help me out, chasing some viable insect eggs. Mine aren't any good, not having any luck hatching them they are many years old.

If anyone could help that would be great thanks

Still looking if anyone can help me out that would be great.

I think, I might be wrong but Riskassess is looking at including Disposal of chemicals in the near future. So it will make the CSIS obsolete for me. Very happy with Riskassess.

Cobalt Chloride and Nickel Chloride are another two that concentrations have been drastically reduced. I think if I was in a DET school I would be pushing for HT to get Risk Assess, I know a lot in our area are using it. Not just our safety but everybody concerned it's kept up to date, any questions...

Question for the brains trust. I have an Extension science student using the following agar, Murashige and Skoog Shoot Multiplication Medium A. used for plant tissue culture. However it is also growing other bacteria and mould. My BRAIN "DO NOT OPEN" plates. Teacher saying she needs to ope...

This is according to the Risk Assess program if you are using it, that is what you are required to follow. lead(II) nitrate, solid Class: 5.1/6.1 PG: II Users: Tch Training: 1,2,5* CAS: 10099-74-8 UN: 1469 GHS data: DANGER Oxidizing Corrosive Harmful Health hazard Environmentally damaging May intens...

Hi Prima & Bigmack, I purchase mine from Hains educational only buy the 125ml you can buy extra caps if need be. I don't have any trouble with the labels (Risk Assess), use laser printer on A4 paper and just use sticky tape over the top. Students and teachers are all aware and taught from Yr7 th...

I don't have any dropper bottles anymore all in stull bottles no more contamination, less spills and very little deterioration. Silver nitrate bottles are covered in foil been using like that for 8-9 years now not a problem. Iodine in amber regent bottles kid use disposable droppers. So much easier,...

We all have our SDS and we have a Risk Assessment for every chemical we have from the Risk Assess program. However looking at a chemical individually doesn't give you an overall picture.

I have tabled our Science chemicals according to the Toxicity, it is confronting to say the least.