Search found 153 matches

by AnnNos
29 Nov 2019, 06:54
Forum: Chemistry and Labware - General
Topic: Wooden Test tube racks
Replies: 6
Views: 2398

Re: Wooden Test tube racks

Revarnished without sanding. It's a big job to sand the whole rack back to bare wood. Haven't had a single one peel back or the varnish bubble.
by AnnNos
28 Nov 2019, 06:56
Forum: Chemistry and Labware - General
Topic: Wooden Test tube racks
Replies: 6
Views: 2398

Re: Wooden Test tube racks

I have revarnished some of mine that has deteriorated over the years. Definitely extended their life span.
by AnnNos
15 Nov 2019, 12:23
Forum: Safety with Chemicals
Topic: LPG limits
Replies: 13
Views: 2847

Re: LPG limits

This is from CSIS Class 2.1 - Flammable gases ●300 kg of LP gas when connected for use (e.g. to a stove or heater). The licence for LPG tanks on DET school sites is part of the maintenance contract administered by Properties Directorate. ●150 kg of LPG not connected for use (reserve cylinders, reser...
by AnnNos
14 Nov 2019, 13:06
Forum: Safety with Chemicals
Topic: CSIS training
Replies: 7
Views: 1998

Re: CSIS training

With the previous CSIS it only had to be completed once and catch up with new staff. The new one seems to have to be done every 5 years.
by AnnNos
28 Aug 2019, 11:54
Forum: Announcements
Topic: Will you be the lucky winner of the Golden Ticket?
Replies: 21
Views: 5322

Re: Will you be the lucky winner of the Golden Ticket?

Got my blue ticket. Thanks Westlab team
by AnnNos
07 Jun 2019, 09:04
Forum: The Polling Booth
Topic: Topic Suggestions for Future PD Sessions
Replies: 12
Views: 4526

Re: Topic Suggestions for Future PD Sessions

Thanks Westlab. I received the stoppers yesterday.
by AnnNos
07 Jun 2019, 07:44
Forum: Safety with Chemicals
Topic: Latest Aus std AS1940
Replies: 5
Views: 2524

Re: Latest Aus std AS1940

The Chemical Safety in Schools package has the quantities that are allowed to be stored on school premises. This includes the maximum quantities per school block.
by AnnNos
22 May 2019, 07:51
Forum: Recipes and Pracs
Topic: year 12 ester prac
Replies: 1
Views: 1930

Re: year 12 ester prac

I have used salicylic acid before and have used it as a solid.
Add 5g salicylic acid to 25mL Methanol in a dry 50mL round bottom flask. Add boiling chips and reflux for 90 minutes.
I haven't used decanoic acid before.
by AnnNos
20 Feb 2019, 06:52
Forum: Biology, Physics...
Topic: Physics prac - Parallel wire conductors
Replies: 3
Views: 2595

Re: Physics prac - Parallel wire conductors

We use alfoil 250mm long, 12mm wide and 20mm apart attached to firm pieces of cardboard either end. Works well
by AnnNos
07 Feb 2019, 07:06
Forum: Chemistry and Labware - General
Topic: Chemical Suppliers
Replies: 11
Views: 4194

Re: Chemical Suppliers

I bought copper sulfate powder and when students dissolved in water and crystallised the solution many of the crystals were green. When I contacted them they advised they buy in bulk, make a huge pile to mix it up then bottle it themselves. Hence, some copper chloride might be present. I don't buy c...
by AnnNos
01 Feb 2019, 07:17
Forum: Chemistry and Labware - General
Topic: Help - mixed chemicals
Replies: 5
Views: 3057

Re: Help - mixed chemicals

Use sodium carbonate to precipitate out the Cu and Mg, decant the solution and bring to neutral and pour down the sink. Then wrap up the solids and dispose of in the rubbish.
by AnnNos
19 Dec 2018, 07:50
Forum: Chemistry and Labware - General
Topic: Another unknown item
Replies: 9
Views: 4358

Re: Another unknown item

It might be a Ruben's tube.
Gas goes in one end, you cover the open end with a balloon membrane and play music (as in a radio or mobile phone) against the membrane. When you light it the flames jump to the beat of the bass notes.
by AnnNos
29 Jun 2018, 11:04
Forum: Announcements
Topic: Technician recognition
Replies: 3
Views: 2549

Re: Technician recognition

Technician Acknowledgement Day - Technowledgement Day or week
by AnnNos
26 Jun 2018, 12:40
Forum: Chemistry and Labware - General
Topic: Light gates
Replies: 2
Views: 2558

Re: Light gates

Vernier has a Sound Level Sensor that is a simple, easily-operated sensor to measure and investigate sound levels in classroom environments but it is not a gate. You can purchase a 'Noise Gate' but I don't think it is used with Data Loggers.