Search found 1155 matches

by Merilyn1
27 Mar 2024, 10:05
Forum: Safety with Chemicals
Topic: Chemical Storage
Replies: 9
Views: 355

Re: Chemical Storage

Five metres? Yeah, good luck with that in most school prep rooms/chem stores!
You're right, you work with what you have. Also good to remember, in the grand scheme of things, we are working with small quantities.
by Merilyn1
27 Mar 2024, 10:03
Forum: Free classifieds - 4 sale/swap/wanted/giveaway
Topic: Wanted .Copy of "Working in Science"
Replies: 5
Views: 211

Re: Wanted .Copy of "Working in the Science"

I only have a hard copy. Keep me in mind if no one comes forward. I am just snowed under to find time try and scan it.
by Merilyn1
26 Mar 2024, 10:50
Forum: Miscellaneous
Topic: Cleaning of Wicks Used in Alkanols prac
Replies: 6
Views: 232

Re: Cleaning of Wicks Used in Alkanols prac

LOL I think I cobbled those Labels on Chemwatch and as I wasn't allowed to use a colour printer , I drew over the GHS symbols with a Red Pen :cheesy: Spirit lamps.jpg The reason I got in thehabit of filtering the spirit back into the saver bottles was due to all the rust and crustys in the burners ...
by Merilyn1
26 Mar 2024, 06:39
Forum: Safety with Chemicals
Topic: Chemical Storage
Replies: 9
Views: 355

Re: Chemical Storage

Segregate according the dangerous goods code is the simplest. Although DGC now only apply to transport, there is no issue with using this system for storage as it clearly states what can and can't be stored together eg oxidisers are to be stored a long way from flammables. Happy for you to PM me and...
by Merilyn1
26 Mar 2024, 06:33
Forum: Miscellaneous
Topic: Cleaning of Wicks Used in Alkanols prac
Replies: 6
Views: 232

Re: Cleaning of Wicks Used in Alkanols prac

Yep - just label the spirit lamps and use the same ones for each chemical each time. I empty the lamps into a labelled bottle like Loopy does, but I put just leave the wicks in the lamps and store in the chem store (which is properly ventilated). Great that you have reached out for help. We are all ...
by Merilyn1
19 Mar 2024, 06:33
Forum: Biology, Physics...
Topic: frozen hearts - help!
Replies: 10
Views: 466

Re: frozen hearts - help!

That's depressing. I hate it when brand new stuff comes back damaged.
by Merilyn1
18 Mar 2024, 11:39
Forum: Biology, Physics...
Topic: frozen hearts - help!
Replies: 10
Views: 466

Re: frozen hearts - help!

Soak them in a bucket with nappysan overnight at least, then throw in the machine. What comes out comes out and what doesn't - depends how fussy your school is.
President lab coats sell theirs for a pretty good price and great quality if you need to replace.
by Merilyn1
15 Mar 2024, 11:35
Forum: Sourcing Materials & Eq Repairs
Topic: Spring Balances
Replies: 14
Views: 5993

Re: Spring Balances

Watched a teacher, new to us but ten years plus experience, be given the role of Year 10 patron who then went onto try to be "mates" with all his students. Cooking pancakes in the labs on his from home gas stove (I put a stop to that), making hot chocolates for them all. It was driving me ...
by Merilyn1
15 Mar 2024, 08:02
Forum: Biology, Physics...
Topic: frozen hearts - help!
Replies: 10
Views: 466

Re: frozen hearts - help!

No help to you now, but all the rules about defrosting meat in the fridge is the assumption you are going to eat it. Leaving them on a bench overnight would be fine. Probably doesn't matter if the hearts are still a little firm. Not sure on the pluck. Never had one that was frozen! Great idea using ...
by Merilyn1
14 Mar 2024, 08:41
Forum: Sourcing Materials & Eq Repairs
Topic: Spring Balances
Replies: 14
Views: 5993

Re: Spring Balances

They've stretched the springs, so just going to throw out and replace. Some were old metal ones and old plastic, how you can't see when the kids are doing the wrong thing, I don't know. I'm seeing more of that in recent times. Kids not being respectful, more inexperienced teachers that don't have g...
by Merilyn1
13 Mar 2024, 09:56
Forum: Chemistry and Labware - General
Topic: Waste from Redox Reactions
Replies: 2
Views: 266

Re: Waste from Redox Reactions

I can't help except to ask if you subscribe to Science Assist? Comparatively small fee which gives you access to a lot of resources, including the ability to ask questions and have them answered by experts. Really useful for those tricky problems.
by Merilyn1
13 Mar 2024, 09:04
Forum: Sourcing Materials & Eq Repairs
Topic: Spring Balances
Replies: 14
Views: 5993

Re: Spring Balances

I've had good intentions and tried to repair. In the end, the broken ones ended up in the bin and I bought new ones. Maybe other people are more patient than me though!
Yeah, swinging them just sounds like a bad idea.
by Merilyn1
11 Mar 2024, 07:52
Forum: Safety with Chemicals
Topic: Standard Operating Procedure (SOP) for removal of chemicals
Replies: 10
Views: 650

Re: Standard Operating Procedure (SOP) for removal of chemicals

The trouble is, not everyone is "sensible". Students cannot be relied upon to be "sensible". Incidents will happen because we aren't being "sensible". The severity of those incidents will be determined by the level of risk associated with the activity. If teachers want ...
by Merilyn1
06 Mar 2024, 14:35
Forum: Safety with Chemicals
Topic: Standard Operating Procedure (SOP) for removal of chemicals
Replies: 10
Views: 650

Re: Standard Operating Procedure (SOP) for removal of chemicals

Welcome aboard! I don't think you would need to be as detailed as that. Having a list of chemicals going out for disposal, with a date they were collected would be sufficient. Ensure that your chemical register is updated to show any chemicals that are gone for good. When chemicals are collected, do...
by Merilyn1
04 Mar 2024, 10:21
Forum: Biology, Physics...
Topic: rat dissection
Replies: 23
Views: 11905

Re: rat dissection

Piglets from Dissection Connection. We've never used rats.
Just done as a class demo.
by Merilyn1
29 Feb 2024, 14:33
Forum: Announcements
Topic: Welcome back everyone
Replies: 18
Views: 1885

Re: Welcome back everyone

My Coordinator and I had a similar theory. That someone has raced back in to put it away and thumped it a bit too hard, causing a slight crack. Then with a bit of pressure - ka-pop. We restrict who can access the chem store but I did have a heap of time off last year. It hasn't happened before, than...
by Merilyn1
27 Feb 2024, 11:21
Forum: Announcements
Topic: Welcome back everyone
Replies: 18
Views: 1885

Re: Welcome back everyone

My ones from Adelab have a finger hole piece next to the opening. Think Jug Band style. (And for a laugh, or maybe make you cry - I'm never sure which- Look for the Christmas Jug Band singing "Daddy's Drinking Up Our Christmas". It is appalling and I am always, always confused about how I ...
by Merilyn1
23 Feb 2024, 09:05
Forum: Announcements
Topic: Welcome back everyone
Replies: 18
Views: 1885

Re: Welcome back everyone

That's 2 winchesters I have heard this happening to in the last 3 months... never in my life as a lab tech has that happened before. I would suggest everyone check their old bottles. Maybe they are not as good as they used to be. I'm also going to be checking each new bottle before it gets put into...
by Merilyn1
19 Feb 2024, 10:57
Forum: Recipes and Pracs
Topic: surface area to volume experiment
Replies: 2
Views: 435

Re: surface area to volume experiment

Potato cubes in iodine....works really well. https://www.google.com/search?q=surface+are+to+volume+experiment+potato+and+iodine+solution&client=firefox-b-d&sca_esv=455241588eaade9a&ei=BJnSZc_CG7mUseMPi8iokAQ&oq=surface+are+to+volume+experiment+potato+and+iodine&gs_lp=Egxnd3Mtd2l...
by Merilyn1
16 Feb 2024, 13:42
Forum: Announcements
Topic: Welcome back everyone
Replies: 18
Views: 1885

Re: Welcome back everyone

And as a delayed welcome back, I thought we had a waste bottle with kerosene in it has leaked a little. When I went to move the other bottles off the shelf to sort it out and clean it up, I discovered that the organic waste bottle was completely shattered at the base. It must have happened over the ...