Search found 720 matches
- 23 May 2024, 14:52
- Forum: Biology, Physics...
- Topic: Agar plates - how old is too old?
- Replies: 6
- Views: 195
Re: Agar plates - how old is too old?
Agree , if they aren't moldy use them .
- 20 May 2024, 14:52
- Forum: Sourcing Materials & Eq Repairs
- Topic: Hoffman voltameter
- Replies: 8
- Views: 352
Re: Hoffman voltameter
We had one similar to that at old school . The taps are the taper type like used in burettes . You should be able to pull them apart and reassemble with a slight smear of silicon grease on the taper . just don't use too much grease as you can plug the hole . Curious you use Sodium sulfate , most lab...
- 17 May 2024, 11:07
- Forum: Safety with Chemicals
- Topic: updating SDS's
- Replies: 8
- Views: 6394
Re: updating SDS's
Thanks Labbie and Anna.
I think I'll do that then .
Otherwise I guess I'd be printing SDS's for every Molarity of every chemical we had in the store![Sad :-(](./images/smilies/sad.gif)
I think I'll do that then .
Otherwise I guess I'd be printing SDS's for every Molarity of every chemical we had in the store
![Sad :-(](./images/smilies/sad.gif)
- 16 May 2024, 15:29
- Forum: Safety with Chemicals
- Topic: updating SDS's
- Replies: 8
- Views: 6394
Re: updating SDS's
Going through ours ATM There are Hydrogen Peroxide ones for 3% ,6%,9% and 35% . (LOL all from Chemwatch of course ) I see they are stored in the fridge . Now it seems that the lower strength ones are in Risk assess labeled bottles and presumably made from diluting down the 35% solution . I was under...
- 15 May 2024, 22:34
- Forum: Recipes and Pracs
- Topic: Neutralisation of HCl
- Replies: 6
- Views: 356
Re: Neutralisation of HCl
As a basic rule , if you have a litre of 1M HCl you can pretty well neutralise most of it with 1litre of 1M NaOH . If you have 1litre of H2SO4 1M it will take 2litres of 1M NaOH or 1Litre if 2M NaOH .(because Sulphuric has twice as many Hydrogens ) But …….. iff’n you are going to sit there and test ...
- 07 May 2024, 11:33
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 1048
Re: Is this Cornflour ?
I just tried the one our HT wants .You can use Conditioner or Dishwashing liquid . Both seemed to work about the same . although the amount of liquid seems more than required . it is sticky . And yes , the mystery stuff in my bags seems to be Cornflour , well at least it works the same as known Corn...
- 07 May 2024, 10:11
- Forum: Safety with Chemicals
- Topic: mini SDS
- Replies: 18
- Views: 1953
Re: mini SDS
As an ex-fire fighter who attended 2 school fires, we did not have time to be checking manifests in the event of a fully involved structure fire and they were both overnight so without a contact person on site there is no way to log on to the system anyway. It sounds nice in theory, but in reality ...
- 07 May 2024, 09:49
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 1048
Re: Is this Cornflower ?
I doubt it's "cornflower". It may, however, be cornflour. Woops , your are probably right there Marama . Spelling was never my strong suit . well I did the Iodine test , and it was a positive for starch , so most like likely is Just Cornflour :D Apparently the alternate slime prac uses Co...
- 05 May 2024, 00:10
- Forum: Safety with Chemicals
- Topic: mini SDS
- Replies: 18
- Views: 1953
Re: mini SDS
Thank you very much PeterK for the links. These are great!!! Hey bigmack I don't enjoy having to use Chemwatch, which i have heard is the consensus with state schools here in Qld and beyond. How are you finding the new job (and probably new area) and where about in QLd are you please? LOL , I don't...
- 04 May 2024, 22:23
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 1048
Re: Is this Cornflower ?
Feed some to Year 8? Probably wouldn’t take much convincing ….. but no :cheesy: iodine test for starch? Brilliant Rosalie . I missed the bleeding obvious . Knew one of you would have a suggestion . \:D/ Will test it on Tuesday . I just hate unlabelled things . I get that hazardous stuff must be lab...
- 03 May 2024, 12:33
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 1048
Is this Cornflour ?
I found this tray of ziplocked bags that has something in it that I suspect is cornflower by the feel of when I squish the bag . I've asked HT and she has no idea what it was used for or what it is . Frustrating thing is I have been asked to get 1kg of Cornflower and ziplocked bags for a slime prac ...
- 02 May 2024, 09:50
- Forum: Safety with Chemicals
- Topic: mini SDS
- Replies: 18
- Views: 1953
Re: mini SDS
Thanks for that Peter .
Just dealing with all this myself for first time in QLD so very timely .
Just dealing with all this myself for first time in QLD so very timely .
- 29 Apr 2024, 12:39
- Forum: Announcements
- Topic: Welcome back to term 2
- Replies: 7
- Views: 5027
Re: Welcome back to term 2
Bigmack - you will get used to Riskassess. A great tool as long as all teachers use it. Happy to share some tips. The labelling feature is worth the subscription on its own. Familia with the Labeling , used that a lot at last school , Bluffing my way through the ordering section , but may ask you s...
- 28 Apr 2024, 18:49
- Forum: Announcements
- Topic: Welcome back to term 2
- Replies: 7
- Views: 5027
Re: Welcome back to term 2
LOL , I’ve been back two weeks now Labbie . (QLD Anglican School) First day on the new job and it was Cross country . Was rostered on but Head Teacher said “ No way , you’ll be off on the back foot “ , she made a call and I got to settle in ….. good call on her part …… really needed that . Anyway , ...
- 28 Mar 2024, 16:33
- Forum: Announcements
- Topic: Happy Easter to you all
- Replies: 6
- Views: 7411
Re: Happy Easter to you all
Calm before the storm for me Labbie .
Start new job next term . Looking forward but know what a break is too .
Start new job next term . Looking forward but know what a break is too .
- 27 Mar 2024, 15:23
- Forum: Free classifieds - 4 sale/swap/wanted/giveaway
- Topic: Wanted .Copy of "Working in Science"
- Replies: 5
- Views: 8941
Re: Wanted .Copy of "Working in the Science"
Thanks for the enquiry LabbieSeth . Actually I wanted the whole thing . I know a Labbie that has the Cert 4 and stuff but has never worked in a a school environment and has no idea and I thought it would help her as it is specific to what is real outside Pathology world . But as it happens , I have ...
- 27 Mar 2024, 10:22
- Forum: Free classifieds - 4 sale/swap/wanted/giveaway
- Topic: Wanted .Copy of "Working in Science"
- Replies: 5
- Views: 8941
- 27 Mar 2024, 09:43
- Forum: Free classifieds - 4 sale/swap/wanted/giveaway
- Topic: Wanted .Copy of "Working in Science"
- Replies: 5
- Views: 8941
Re: Wanted .Copy of "Working in the Science"
Doh , I just realised it’s called “Working in Science”
- 27 Mar 2024, 09:40
- Forum: Safety with Chemicals
- Topic: Chemical Storage
- Replies: 14
- Views: 11006
Re: Chemical Storage
….. eg oxidisers are to be stored a long way from flammables. I remember seeing that when I first read the WHS recommendations on that Merilyn . They said IIRC , a distance no closer that 5 Meters but seeing as my Chem store was barely 3 meters long , I realised you just have to do the best with wh...
- 26 Mar 2024, 09:49
- Forum: Miscellaneous
- Topic: Cleaning of Wicks Used in Alkanols prac
- Replies: 6
- Views: 8198
Re: Cleaning of Wicks Used in Alkanols prac
In my experience ,most wicks can be evaporated an or washed , but the higher alkanols like Pentanol and Octanol are very "oily" and are almost impossible to clean effectively .And they stink to high heaven :yuck: I found this out the hard way when the Chem teacher decided he now wanted som...