Australia's Science Forum

You can remagnetise old magnets with the neodymium magnets. I haven't actually tried it yet, but I saw it on YouTube. Maybe it'll work to strengthen the dodgy ones too. You can only try. Yes it does work . We have a special re-magnetizer . it is a neodymium magnet moulded into a plastic handle .Jus...

Interesting , we have always used Sulfuric acid . Good to know the carbon electrodes work . We just got some replacement electrodes with the Platinum foil type …….bloody expensive .

Labbie wrote: ↑28 Jan 2020, 09:56 Are you ready for term 1?

Bring it on

I'm happy with it . I sometimes think we can get a bit carried away with lead Paranoia. I was raised on tank water where the roof was full of lead head nails and lead flashing . I then had lead solder running through my fingers and breathed the fumes of it everyday for 25 years . Am I sick ?? maybe ...

We have a couple of lead trays here that our acid solutions have always been stored in .

It's strange that yours were in a drawer though .wouldn't have thought you would fit very high bottles etc in them . Unless it was those old reagent bottles with the ground glass lids .

:cheesy: Sorry, shouldn't laugh but the rep for this area hasn't answered any of the emails I've sent her and Ive rang numerous times. I did get to speak with her once but she never followed up on my enquiry :-o MariaQ What a shame! Our rep Bill is great - sends regular emails, rings, answers his p...

@ Macca , that is an awesome inventory you have created .It is amazing how all those bits and pieces add up . @Matt_Coffs . What data base do you use ?/ I'm wanting to do something like that too ..I especially like the idea of adding pics . That's one thing that XL won't do . (Well you can add pics ...

We still have dozens of wooden ones and I've wondered the same thing about contamination . I've seen at other schools what happens to plastic ones when hot test tubes are put in them . For that reason I will stick to our old wooden ones 'til further notice . AnnNos , did you sand them back to wood o...

Merilyn
Thankfully the disposals bit of CSIS has been updated on the online version.
I saw an example of this at a recent Science Assistant training where we were asked to bring our old printed manuals and compared it against the online one . This bit at least has been updated .

Thanks Ines They seem to be Soda glass .Seems that's what all our regular suppliers have . I was looking for Pyrex ( Borosilicate ) ones as we have been having a lot crack when they do a prac where they are on a beaker of water heated with a Bunsen with Ice cubes in them . HT has now decided that it...

Great idea! I would have cleaned the oxidation off the surface of the magnesium first though......should be nice and shiny Normally I do run it through some sand paper to clean it up David , but in the particular prac where it was used , we were getting unpredictable results and we put it down to i...

Does anyone know where to get these ?
I just got quoted $285 +GST for a pack of 10

Edit: sorry 125mm

We have mixed heavy metals and mixed organics .

Matt , is it cheaper to have separate bottles ?

We wet the place down in the morning and evacuated to Coffs Harbour as recommended by the RFS. The smoke in Coffs was chokingly thick in the morning but by lunchtime the wind was blowing offshore so it not so bad . We managed to get a tiny air-conditioned dogbox at a camping ground so we were lucky ...

Gosh Merilyn , I had to check it wasn't April fools day .
It hasn't happened here in 20 years

The bell disappeared from the bell jar somehow, so we put a phone in and call it. Works beautifully. We've got an oil-free pump, no brand markings on it I'm afraid. That's an awesome idea Marama T :thumbup: It also shows that radio waves can travel through a vacuum too . We have an electric bell in...

Thankyou all for your blessings and I offer mine to you Merilyn and all others out there tomorrow . May the idiots chose wisely....we have enough danger already . Incidentally the Pump down by my dam just failed a few weeks ago and I've been using a spare to water the garden but it doesn't have enou...

Not good here . We had 40 houses destroyed over the weekend around our school . Tomorrow our valley is likely to be evacuated ...one of our teachers has been advised that tomorrow he has to evacuate ..the power will be disconnected from that area . Won't be sticking around to try and fight a raging ...

Hey bigmac, Which textbook is your chem teacher using, as we too are getting some weird results? Could you please find out for me. Thnks Carlie Hi Carlie It's an old text book called Chemical Science ,Laboratory Manual ,Carswell. We have both the student version and the teachers version which has a...

We just did it .Chem teacher used an old book they used to do it 20 years ago .

0.2M Fe(NO)3
0.002M KSCN

He said it worked a teat . I wonder if your books have typos in them and the Molarities are back to front