Search found 62 matches
- 23 May 2023, 12:41
- Forum: Biology, Physics...
- Topic: Spectrum Tubes
- Replies: 8
- Views: 4416
Re: Spectrum Tubes
We use an IEC EHV 0-6000V power supply which works. Can also be used for cathode ray tubes, Maltese Cross, paddle wheel etc. It's worth investing in for ease of use.
- 14 Oct 2022, 08:47
- Forum: Chemistry and Labware - General
- Topic: Flame Test
- Replies: 14
- Views: 9170
Re: Flame Test
The flame colour depends on the metal cation so strontium carbonate and strontium chloride should give the same result. We use strontium chloride and it works well.
- 09 Sep 2022, 09:17
- Forum: Recipes and Pracs
- Topic: unknown anions
- Replies: 3
- Views: 4196
Re: unknown anions
Do you use the Risk Assess program by Phillip Crisp? If so you can do a search of previous years RA (assuming this prac has been done in previous years)
- 26 Aug 2022, 13:49
- Forum: Miscellaneous
- Topic: 2020 Yr 11 Independent Chemistry Exam Marking Criteria
- Replies: 2
- Views: 4628
Re: 2020 Yr 11 Independent Chemistry Exam Marking Criteria
Yes I do!
Have sent you a PM
Have sent you a PM
- 23 Aug 2022, 13:27
- Forum: Miscellaneous
- Topic: 2020 Yr 11 Independent Chemistry Exam Marking Criteria
- Replies: 2
- Views: 4628
2020 Yr 11 Independent Chemistry Exam Marking Criteria
Hi everyone,
Thought I might try here.
Does anyone have a copy of the 2020 Yr 11 Chemistry Independent Exam Marking Criteria they could share with me?
It would be much appreciated.
Anastasia
Thought I might try here.
Does anyone have a copy of the 2020 Yr 11 Chemistry Independent Exam Marking Criteria they could share with me?
It would be much appreciated.
Anastasia
- 09 Feb 2022, 09:39
- Forum: Recipes and Pracs
- Topic: effervescent tablets
- Replies: 4
- Views: 4614
Re: effervescent tablets
We use Homebrand denture tablets..
- 16 Nov 2021, 10:33
- Forum: Recipes and Pracs
- Topic: Dilution
- Replies: 6
- Views: 3136
Re: Dilution
Use the formula C1 x V1 = C2 x V2 where C is the concentration and V is the volume, 1 is the first solution and 2 is the second So if you wanted to prepare 100ml of 0.002M solution from a 0.1M solution V1 = (C2 x V2) / C1 = (0.002M x 0.1L) / 0.1M = 0.002L which is 2ml So pipette 2ml of the 0.1M solu...
- 11 May 2021, 14:30
- Forum: Miscellaneous
- Topic: Food technology ordering program
- Replies: 6
- Views: 7764
Food technology ordering program
Hi everyone,
Just wondering if there is an equivalent to RiskAssess for Food Technology? How does the Food Tech assistant at your school keep track of orders/prep for practical classes?
Any info would be appreciated
Anastasia
Just wondering if there is an equivalent to RiskAssess for Food Technology? How does the Food Tech assistant at your school keep track of orders/prep for practical classes?
Any info would be appreciated
Anastasia
- 30 Mar 2021, 13:14
- Forum: Miscellaneous
- Topic: PLNTS Introduction to Science
- Replies: 9
- Views: 8125
Re: PLNTS Introduction to Science
Germanic ??
- 16 Feb 2021, 13:41
- Forum: Recipes and Pracs
- Topic: Hydrochloric Acid
- Replies: 10
- Views: 4301
Re: Hydrochloric Acid
I'm thinking: C1 x V1 = C2 x V2 To make up 100ml of 1M (32% HCl assumed to be 12M) 12 x V1 = 1 x 0.1 V1 = 8.33ml So the 100ml of 1M HCl contains 8.3ml 32% HCl To make up 1L of 2M 12 x V1 = 2 x 1 V1 = 166.66ml So the 1L of 2M HCl should contain 166.66ml 32% HCl But you already have 8.33ml of it in th...
- 16 Nov 2020, 09:26
- Forum: The Lab Tech Position
- Topic: How do I describe what I do?
- Replies: 49
- Views: 41338
- 12 Oct 2020, 11:04
- Forum: Chemistry and Labware - General
- Topic: vernier go direct sensors feedback
- Replies: 3
- Views: 2584
Re: vernier go direct sensors feedback
We purchased the Dynamic cart and Track system which has been used in Physics and Investigating Science. Teachers and students found it easy to download software onto their laptops, set up and use.
- 03 Aug 2020, 12:34
- Forum: Miscellaneous
- Topic: Bee Hive
- Replies: 6
- Views: 7295
Re: Bee Hive
https://policies.education.nsw.gov.au/p ... cy-schools
I'm assuming you would need to follow the above guidelines and have a policy? Or is that only for vertebrates?
Not worth the trouble IMO
I'm assuming you would need to follow the above guidelines and have a policy? Or is that only for vertebrates?
Not worth the trouble IMO
- 25 Jun 2020, 14:11
- Forum: Recipes and Pracs
- Topic: Potassium Iodide
- Replies: 6
- Views: 3879
Re: Potassium Iodide
Potassium iodide is usually reacted with lead nitrate to give a bright yellow precipitate.
Could it be that your potassium iodide is contaminated?
Could it be that your potassium iodide is contaminated?
- 12 Mar 2020, 11:05
- Forum: Sourcing Materials & Eq Repairs
- Topic: MTA products going downhill fast?
- Replies: 24
- Views: 15067
Re: MTA products going downhill fast?
No not a Nicole but two other individuals who I won't name plus the general sales email. Concerning that so many at MTA don't reply to emails!
- 11 Mar 2020, 11:17
- Forum: Sourcing Materials & Eq Repairs
- Topic: MTA products going downhill fast?
- Replies: 24
- Views: 15067
Re: MTA products going downhill fast?
I am disappointed with the service at MTA. I have sent multiple emails to seek assistance to 3 different people (our assigned sales support person, technical person and general sales enquiry) over a period of a month and have as yet to hear from any of them. I will not be using MTA for any of our or...
- 20 Nov 2018, 08:08
- Forum: Miscellaneous
- Topic: iron (lll) thiocyanate
- Replies: 16
- Views: 17565
Re: Iron(111)thiocyanate
From the recipe section of Pearson Chem 12 to prepare 0.0002M iron(III) thiocyanate
pipette 10ml 0.002M KSCN into a 100ml volumetric flask
make up to 100ml with 0.002M Fe(NO3)3
make fresh as solution degrades
pipette 10ml 0.002M KSCN into a 100ml volumetric flask
make up to 100ml with 0.002M Fe(NO3)3
make fresh as solution degrades
- 13 Nov 2018, 13:40
- Forum: Recipes and Pracs
- Topic: Reversible Reactions Prac?
- Replies: 12
- Views: 8214
Re: Reversible Reactions Prac?
Our Chem teacher did a demo using conc. HCl in a fume cabinet and a solution of 0.1M cobalt chloride. She also heated it and put it in an ice bath. She said it worked well.
- 15 Oct 2018, 09:11
- Forum: Announcements
- Topic: Welcome back everyone to chemtalk
- Replies: 26
- Views: 24060
Re: Welcome back everyone to chemtalk
So glad its back, thank you Westlab!
- 22 Nov 2017, 13:55
- Forum: Safety with Chemicals
- Topic: calcium granules
- Replies: 5
- Views: 3265
Re: calcium granules
Thanks for your replies, will put aside for the next chemical disposal.