Search found 559 matches

by Lyn
10 May 2021, 11:01
Forum: Safety with Chemicals
Topic: LEAD NITRATE
Replies: 34
Views: 10608

Re: LEAD NITRATE

Lead nitrate and potassium iodide makes a bright yellow precipitate. Instant gratification and spectacular result. Silver nitrate and potassium iodide makes a white precipitate. Not as spectacular. We use sodium hydroxide 0.1M and copper sulfate 0.1M for conservation of mass practical. We are using ...
by Lyn
05 May 2021, 10:54
Forum: Chemistry and Labware - General
Topic: Flame Test
Replies: 7
Views: 865

Re: Flame Test

I have just had a look through several different Y7 textbooks that we have here and none of them mention flame tests. What Y7 textbook are you using? Even Y7 states of matter practicals don't cover flame tests. If push comes to shove then paddle pop sticks soaked in solutions. Keep the pretty flame ...
by Lyn
29 Apr 2021, 16:01
Forum: Recipes and Pracs
Topic: Agar Plates
Replies: 31
Views: 14522

Re: Agar Plates

HI, Saccharine goes by the names of - Sweet & Low, Sweet Twin, Necta Sweet. Sucralose goes by the name of Splenda. I saw the Splenda product in Woolworths today in the sugar section. That is the artificial sugar/sweetener section. Acesulfame - E950, Sweet One, Sunetti. I think you will have to do so...
by Lyn
17 Mar 2021, 12:02
Forum: Sourcing Materials & Eq Repairs
Topic: Radiation cans
Replies: 12
Views: 1487

Re: Radiation cans

Try forty years in the same school. Is it time to retire? :coffee: Yes I have the black and white sprayed aluminium cans and the silver ones if we use them are covered in aluminium foil. I think some of the cans are overdue for a repaint though. Spray outdoors using a flat white and flat black paint...
by Lyn
12 Mar 2021, 12:08
Forum: Sourcing Materials & Eq Repairs
Topic: van der graaf manual
Replies: 6
Views: 1051

Re: van der graaf manual

Science ASSIST has an SOP for demonstrating the van de graaff generator. Comes with safety notes and operating procedures. Make a couple of copies so that if one of your teachers walks off with the information you have another set tucked safely away. This site also has other SOP's which I have downl...
by Lyn
03 Mar 2021, 10:50
Forum: Sourcing Materials & Eq Repairs
Topic: Sourcing of frozen rats
Replies: 31
Views: 8665

Re: Sourcing of frozen rats

I have bought rats (dead obviously) from one of the pet stores here in Darwin. It was either Petbarn or Petstock. The biology teacher at that time wanted rats that smelled fresh and that looked newly dead :D and she wanted them at short notice. Usually though, we get rats from Southern Biological wh...
by Lyn
16 Feb 2021, 15:37
Forum: Recipes and Pracs
Topic: Hydrochloric Acid
Replies: 10
Views: 1652

Re: Hydrochloric Acid

My first response this morning when I read this was just make up a fresh batch of 2M and be done with it. My second response after reading all the advice above is: " make up a fresh batch of 2M and stop stressing out". My head hurts after reading the above two answers. :-? Is it :coffee: time?
by Lyn
14 Dec 2020, 10:35
Forum: Miscellaneous
Topic: Risk Assess - server hangup problems
Replies: 3
Views: 1526

Risk Assess - server hangup problems

Has anyone or any of your teachers had problems when using Risk Assess and gotten a blank page with server hangup on it. I have a teacher who is having problems when she is trying to update her pracs or create new pracs. When she updates the risk assessment she gets this blank page with server hangu...
by Lyn
11 Dec 2020, 12:58
Forum: Safety with Chemicals
Topic: Hazardous Chemical Register
Replies: 40
Views: 10901

Re: Hazardous Chemical Register

I gave up using Chemwatch years ago. I just use ChemSupply for most SDS's now. Their site is user friendly. They have SDS's also from other suppliers that provide them with chemicals. If all else fails the internet can usually provide relevant SDS's for any elusive chemical that can't be pinned down.
by Lyn
16 Nov 2020, 10:59
Forum: The Lab Tech Position
Topic: How do I describe what I do?
Replies: 49
Views: 20924

Re: How do I describe what I do?

Thanks Remlap12 for the information on the update. It helps us all to know that there is this information available. Now if only the administrations we work for would take this information on board and use the updated classification designations for our job descriptions.
by Lyn
13 Nov 2020, 12:17
Forum: Safety with Chemicals
Topic: Gloves
Replies: 5
Views: 1570

Re: Gloves

Has anyone tried Bunnings for disposable nitrile gloves? I have a box of 75, Hercules brand, supposedly extra strong, chemical safe and latex free. I have them tucked away in the compactus so that the teachers don't use them for general distribution. I have normal disposable gloves for general class...
by Lyn
13 Nov 2020, 10:53
Forum: The Lab Tech Position
Topic: How do I describe what I do?
Replies: 49
Views: 20924

Re: How do I describe what I do?

Please google the following: School science laboratory technicians national standards for professional practice 2014. This document will give you an outline of what it is that we do in our jobs. Just adapt it to your own situation.
by Lyn
23 Sep 2020, 10:53
Forum: Announcements
Topic: NEW GHS
Replies: 5
Views: 2292

Re: NEW GHS

Thanks for the information Labbie and bigmack. I like to stay at least one step ahead of the WHS person here. :thumbup: Then again retirement is always an option.
by Lyn
08 Sep 2020, 10:26
Forum: Sourcing Materials & Eq Repairs
Topic: swan neck tubes
Replies: 11
Views: 2438

Re: swan neck tubes

Check the search function for this site - swan neck glass tubes. Ian posted an image of an alternative swan neck. Plus there are also other suggestions.
by Lyn
05 Aug 2020, 17:02
Forum: Announcements
Topic: Chemwatch
Replies: 3
Views: 4931

Re: Chemwatch

I have Chem Supply listed in my favorites section and just download when I need to update an SDS for a chemical. I don't have to logon to the site. If they don't have an SDS for any obscure chemical that I might still have on my shelf I then do the Google thing.
by Lyn
26 Jun 2020, 10:38
Forum: Recipes and Pracs
Topic: Silver powder recovered from metal displacement reaction
Replies: 2
Views: 1230

Re: Silver powder recovered from metal displacement reaction

Are you planning for your retirement? Sorry about that - last day of term. You could try using a carbon block and a Bunsen blue flame. We had a piece of equipment (a type of tube - blowpipe) which enabled the user to make the flame to burn hotter to melt various metal powders, but we haven't done th...
by Lyn
25 Jun 2020, 16:24
Forum: Recipes and Pracs
Topic: Potassium Iodide
Replies: 6
Views: 2266

Re: Potassium Iodide

Potassium iodide of any strength 1M or 2M, will eventually turn yellow in its container, usually pale yellow. That colour change happens after a long period of time. Even my 0.1M solution has a faint hint of colour but it has been sitting on the shelf for a long time. So I may have to make up a fres...
by Lyn
19 Jun 2020, 16:01
Forum: Recipes and Pracs
Topic: blood- splatter and skin safe
Replies: 4
Views: 1954

Re: blood- splatter and skin safe

Google - FSB06 blood spatter. Hopefully it will give a site (FSB blood spatter) that has a number of blood spatter recipes (Forensic Investigations) you can work with. But you have to make sure that the 06 is included in the search.
by Lyn
18 Jun 2020, 12:30
Forum: Chemistry and Labware - General
Topic: Cleaning carbon rods
Replies: 5
Views: 2641

Re: Cleaning carbon rods

Try steel wool. Any way you clean them will be messy. If the copper deposit is extremely stuck on then perhaps remove it by scraping with a single edge blade or a Stanley knife and then use the steel wool.
by Lyn
05 Jun 2020, 12:08
Forum: Miscellaneous
Topic: Policies
Replies: 7
Views: 2522

Re: Policies

Macca

Let me know if the guidelines I sent were of any use. Feedback is always useful if it wasn't fit for the purpose that you needed assistance with.