Australia's Science Forum

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. H...

No problem, if you want to do a video call send me a message and we'll set it up. You can share your screen and show me the issues if you haven't managed to get it sorted.

For the Consequences/Likelihood, there is information on one of the tabs, it also says The level of risk can be assessed as per the directions below and in reference to Section 3.5.2 of the OHS Risk Management Procedure. Also, you will not find anywhere a column telling you what Consequences/Likelih...

Make sure you have downloaded and working in Excel. If you are trying it in a google doc it won't work and you'll be in all sorts of pain. I also just downloaded the blank template to check it out... the first line does not work for some reason (as in picking the Risk ranking automatically) after yo...

bigmack wrote: ↑08 Jun 2023, 12:45

macca wrote: ↑08 Jun 2023, 08:39 Bottle of Black Douglas would be lovely lol

Done ......if you still are chucking them

I'll up you.. above and I'll add $20

I'll pay you $20 towards beer for you...send them down here

I believe the source sets that are available through our suppliers... when they are past their active date you can peal off the stickers and they can go in the bin.

We have not been given a directive to get rid of any of our sources.... all super safe anyway.

Oh my, what a disaster, glad it is going from your site. We also don't have it here. I have one of these with the appropriate filter for the nasties' I have onsite here. I can't remember the code off hand but I have a fine particulate canister and an acids or organics canister attached. You can mix ...

I would run it past head of science

You can get Bromine from Merck (very expensive for a once off demo), we only have the Bromine water on site... I have said 'no' to requests for anything different.

Is all of them or just one or two ? Sounds like you have done pretty much all you can . If they are the ones with Teflon tips , I’m thinking the tip is damaged . You could try slicing a small bit off the end as parallel as you can with a Stanley knife . Failing that , the round filing cabinet might...

We have the Hameg HM 203-7

Has anyone ever bought from Sigma? We used to get lab supplies from them all the time when I worked in medical research, but not sure about for a school. I was in a similar situation a couple of years ago with a science extension student. Setting up the account was very easy. I contacted one of the...

We don't even really soak.... students dip, swirl around a bit then burn away.

I just worked out our service factor (after figuring out what that was!) and it is 0.248! Although I do feel very busy (says me spending time here! :cheesy: ), I can't see it would need to be as high as 0.8. I would have nothing to do! And it's kind of my fault I am so busy as I was employed at 3 d...

Interesting... That's what we had at my prevous school (0.1 and 1M) but they seem to use a variety of concentrations here! Maybe because they were just "there"? I don't know... we've got 5M, 6M and 2.5M of some things.... I just thought maybe things had changed over the years I wasn't wor...

RosalieL wrote: ↑24 Apr 2023, 15:13 Do you guys swap your droppers out for caps for all concentrations of acid or only the stronger ones?

Just the stronger ones for us.

IMO, we have Antimony, is all good with me. Use gloves and demo only.

We use chinagraph pencils, students don't seem to steal them, easy to wipe off.

Since I've popped the 3 day warning in RA, I've had every teacher who have put in pracs late come and see me within minutes... love it. They seem to be running scared.