Search found 2314 matches

by Labbie
20 Aug 2019, 11:50
Forum: Sourcing Materials & Eq Repairs
Topic: Sourcing zinc strips
Replies: 8
Views: 105

Re: Sourcing zinc strips

try wire cutters, how big do you need your strips?
by Labbie
19 Aug 2019, 13:18
Forum: Safety with Chemicals
Topic: Disposal of Sodium Thiosulfate?
Replies: 14
Views: 1101

Re: Disposal of Sodium Thiosulfate?

This is so very true, before I retired we asked that question to chemwatch, and they said in the future they may have a part for DoE schools. But I would not hold my breath.
by Labbie
19 Aug 2019, 09:46
Forum: Miscellaneous
Topic: Happy STAR week
Replies: 4
Views: 130

Re: Happy STAR week

I do'nt think the DoE do a star week, but happy star week to you all.
by Labbie
17 Aug 2019, 14:01
Forum: Safety with Chemicals
Topic: Disposal of Sodium Thiosulfate?
Replies: 14
Views: 1101

Re: Disposal of Sodium Thiosulfate?

If you are a private school, see your Head teacher, and get a classified answer on Riskasses or chemwatch, not both. And stick to it. If you are a DoE school you have no choice, its CSIS chemical safety in school, and that is it.
by Labbie
12 Aug 2019, 15:02
Forum: Safety with Chemicals
Topic: Disposal of Sodium Thiosulfate?
Replies: 14
Views: 1101

Re: Disposal of Sodium Thiosulfate?

Oh well done Bigmack, a typo from the DoE, I did paste & Copy
by Labbie
12 Aug 2019, 14:04
Forum: Safety with Chemicals
Topic: Disposal of Sodium Thiosulfate?
Replies: 14
Views: 1101

Re: Sodium thiosulfate

sodium thiosulfate* sodium hyposulfite hypo 7-12 1 2 3 4 5 6 - NR Not Hazardous - - 7772-98-7 Moderately toxic if ingested. Forms toxic gases on contact with acids and on heating. Photographic fixer. Used in crystallisation experiments and redox titrations. Small quantities can be sued for chemical ...
by Labbie
09 Aug 2019, 08:38
Forum: Sourcing Materials & Eq Repairs
Topic: Rubber Stoppers
Replies: 18
Views: 2077

Re: Rubber Stoppers

Good for you Cactus, you did so well.
by Labbie
07 Aug 2019, 09:35
Forum: Recipes and Pracs
Topic: Iron II Sulfate
Replies: 14
Views: 1395

Re: Iron II Sulfate

Last a few more days, then without one.
by Labbie
06 Aug 2019, 14:01
Forum: Recipes and Pracs
Topic: Iron II Sulfate
Replies: 14
Views: 1395

Re: Iron II Sulfate

Iron II Sulfate, should be made up fresh every time, for it to work. Put a Fe nail (NEW) of course into the solution, this helps it not going to Iron III a little slower. The little nail really does work.
by Labbie
31 Jul 2019, 17:52
Forum: Recipes and Pracs
Topic: Open Day Ideas
Replies: 66
Views: 6466

Re: Open Day Ideas

so glad it helps you MTG
by Labbie
31 Jul 2019, 17:51
Forum: Sourcing Materials & Eq Repairs
Topic: Chemical quality
Replies: 5
Views: 278

Re: Chemical quality

LR Laboratory Reagent
GR General Reagent
AR Analytical Reagent
by Labbie
31 Jul 2019, 10:32
Forum: Recipes and Pracs
Topic: Open Day Ideas
Replies: 66
Views: 6466

Re: Open Day Ideas

This thread may help you MTG
by Labbie
23 Jul 2019, 12:53
Forum: Chemistry and Labware - General
Topic: identifying acids
Replies: 3
Views: 549

Re: identifying acids

Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, rust or scale from ferrous metals, copper, precious metals and aluminum alloys. A solution called pickle liquor, which usually contains acid, is used to remove the surface impurities. Wikipedia
by Labbie
03 Jul 2019, 17:20
Forum: Chemistry and Labware - General
Topic: Glass rod puzzle
Replies: 12
Views: 1107

Re: Glass rod puzzle

We have rubber ends, and after washing we put them rubber ends only into a milton solution, never had a problem. By using the rubber ends to mix with, does save the glass beakers. The clear plastic did last longer then the rubber ones.
by Labbie
02 Jul 2019, 11:23
Forum: Recipes and Pracs
Topic: Agar Plates
Replies: 28
Views: 3058

Re: Agar Plates

I’m with you. Generally year 12s can open their agar plates of they know what they’re culturing and there aren’t any unknowns. But since there unknowns on that plate I’d also be advising against it!! Can’t they look at them through the plates?