Australia's Science Forum

So a bit of head scratching and I come up with a simple version. Its just a glass tube inside a larger tube . The hardest part was cutting the large glass tube . [attachment=1]easy condenser.JPG[/attachment][attachment=0]close up.JPG[/attachment] It worked too , pulled 20mls of distillate from it be...

Ever since I've been here , we always had this basic air distillation prac for junior classes. It was hopeless .Steam would shoot out the end unless you literally held a match under the flask . At most you'd end up with a few drips of condensate out the end . [attachment=3]Air_still_1024x1024.jpg[/a...

LOL , our Home science Assistant did that course a week or so ago . She had me on "phone a friend" . She got stumped on the same question . I was no help . She , just like you worked it out and lamented in a similar fashion as you :console: ...stupid ,stupid stupid . The other question that got her ...

Oops , so's mine again...... apologies to Westlab

kimmy wrote: ↑29 Mar 2021, 11:23

I have my own log in details not the schools details.
Just do your own email address etc and get your own log in even if just to check prices

Have you tried it lately kimmy .
I used to have one too , that's how I did it too ,but last week it no longer worked .

Oh I see , they have changed it .

Oh well that's fine by me . If I can't see a price ,I will shop elsewhere. Simple, I only have X amount to spend each year . I will buy where I know how much it will cost .

Labbie wrote: ↑19 Mar 2021, 09:35 I would'nt put any acid down the sink with out neutralising it first.

Me nether, but Sodium Hydroxide isn't an acid.

Labbie wrote: ↑18 Mar 2021, 15:11 Or add Sodium Carbonate to (bi-carb soda) to neutralise it before it goes down the sink. So much cheaper.

How so Labbie , I would have thought you'd need to add quite a bit of acid to it ....not more base

I will also check out drain cleaner some of which have other stuff in them I've noticed. Sorry I may have been a bit cryptic. I was suggesting you can just tip it down the drain ( with the tap running ) rather than pay for waste disposal of it. We just use Plain Caustic Soda from the Supermarket he...

If its black stuff ,I remove it by pulling a length through folded sand paper . A couple of pulls and its gone . Probably stating the obvious , but when you heat it in the crucible , the lid should be on . Then when you lift the lid ( with tongs) , it lets in fresh oxygen and bursts into flames . Al...

You can buy a jar of caustic soda from the supermarket . On the label it says "cleans drains faster" ....just say'n

Its always exciting seeing what a new school has squirrelled away . Usually its the same ol same ol , but sometimes you come across some real gems you’ve never seen before . I’ve been at this school for over 5 years now and I still occasionally open a cupboard or drawer and think whoo , how have I n...

175mm tall, 49mm diameter sounds about right ....(its not 490mm diameter )

On the MTA website that sells them , there is a PDF instructions to down load but it looks rather generic .
https://www.teaching.com.au/product/SER1052222#

LOL Merilyn ...just had to google Pony Beads

We mostly do it as a junior (year8 I think) prac so they care little about the outcome :console: . Certainly wouldn't be allowed to use Hexane as it has always been Year 11-12 only . Incidentally , Hexane is teacher only now on Riskaccess . I am curious what sort of improvement your method gets thou...

We use methylated spirits and any soft leaves - so pinch stuff from the garden. I'm not sure of the method, but I do know they have to heat it first - usually a water bath set up. Sorry, can't help any more! That's what we use here too Merilyn . The Chlorophyll is extracted from the leaves by placi...

Just got asked to randomly walk through a class wearing something unusual and carrying something interesting .
Apparently its an observation skills exercise .
The mind is going wild with options

Done Labbie .

Rosalie ,I'll have to use email as the files are too large to upload or PM .

Glad you got it sorted . Yes , you have to press hold power for 3-5 seconds to fully power off . That's something you'll probably have to do after every prac to save the batteries . ....otherwise , as you found out they just go to standby . Do sure about training . Never heard of for them . If it he...