Australia's Science Forum

My register/stocktaking document is off the Vic ed dept site. It is in alphabetical order, it tells you chemical/substance, room for amount, container size, strength, hazardous substance, dangerous goods, dangerous goods class with description, sub catergory and packaging group. eg Acetic acid glaci...

They shouldn't eat science experiments so use gelatine. Personally I hate the smell so I use jelly crystals, and whatever, split peas, pasta, no lollies etc. I have all different pasta shapes dyed different colours for one cell prac and they glue them onto a bit of card. I think bits of wool for wig...

Welcome back to you all too. Invite all your labbie friends to get back onto chemtalk, I miss the daily discussions. It's a lonely job when you're the only school lab tech for miles.

Keep me posted, I want to know if the iron oxide works.

I think the 0.1M is for precipitates. We use the foil for magnet pracs. Maybe the solid in crystal gardens. All waste is collected. PPE used. Dont touch it, drink it, or sniff it etc. Most of our chemicals will have associated dangers. You should always err on the side of caution and use PPE.

Use a stopper. I have a stack of lids that seem to fit lots of little bottles. Don't know where they came from though. I use little bottles for powder testing, keep them in kits.

I would love to see a pic of the top and also of the rubber bung removed to have a better look at it but, I think the name is Dreschel Bottle It also seems to be called a Dressel bottle and a Drechsler bottle It is a Gas washing Jar as far as I can tell . Drechsler.jpg The inverted level marks I th...

Solution from an ex teacher. It is a transfusion bottle. From the old days when blood transfusions were done with glass bottles. The Bung top has 2 options for either metal or plastic insert. A small hole.
There is the long glass tube within to breathe so as to allow it to run when upside down.

pic:
it has an outlet spot on top for a very small tube? And inside is a capillary tube like thing, so it must invert and displace something I think.

Wondering if anyone has an update for this reaction. my old recipe is 1. 0.10M Potassium Iodide (KI 16.60 g/L) 2. 0.01M Sodium Thiosulphate (Na2S2O3.5H2O, 2.48g/L) 3. 3% Starch 4. 0.04M Sodium Persulphate (Na2S2O8. 9.52g/L) mix 100ml of 1., 10ml of 2., and 1ml of 3.,in a 500ml flask. Add 100ml of 4....

If you are posting Pics from an Iphone , you will still need to resize pics first .( I'm sure there would be an android version too) I have a free app called "resize It " .It is also handy for rotating pics that appear sideways when you post them . The trick for sideways pic is to click o...

Help, how do I post a photo of glassware I am trying to identify? I thought it was a dresden jar but I can't find it when I search www, under that name.

Wondering how this prac request went and did you make methyl orange? It is good to make analytical reagents/indicators. I have a great book which has recipes for universal indicators, however I would google the chemical's safety, before purchasing. If necessary I would look for an alternative prac, ...

Depends how much you use, how much space you have etc. I sometimes decant into a bottle of each strength if they are in dropping bottles. I would keep 0.1M for sure.

I run it under warm to hot water, if you just want to tip it out/collection waste, diluting it wont matter.

Agreed Marama T, I reuse them if possible. But if they are clean should be recyclable.

I have sodium silicate solution, it is thick and doesn't work as well as the old solution I inherited. The original was made from a powder which you added water to and dissolved under pressure. firstly I never managed to dissolve it even with a pressure cooker. Secondly the newer one i bought is too...

I always wondered what these were used for. Now I know. We have used beakers with different solutions.....despite having a few of the semi circle things. Another thing I know now. Thank you.

I usually go and scavenge under pine trees, I haven't done this prac but it sounds cool so I will scavenge tonight and hopefully try it out.

Marama T wrote: ↑14 Aug 2023, 12:20 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.

Yep we all love an explosion. But we will give this one a miss.