Hi
We went to a landscape supplier in our area and they were happy to supply us with some granite, limestone, basalt, scoria and sandstone samples.
Search found 35 matches
- 10 Sep 2020, 12:45
- Forum: Sourcing Materials & Eq Repairs
- Topic: Rock and mineral specimens
- Replies: 7
- Views: 3974
- 26 Jun 2020, 10:48
- Forum: Recipes and Pracs
- Topic: Silver powder recovered from metal displacement reaction
- Replies: 2
- Views: 2335
Re: Silver powder recovered from metal displacement reaction
Maybe if it was gold
- 26 Jun 2020, 10:26
- Forum: Recipes and Pracs
- Topic: Silver powder recovered from metal displacement reaction
- Replies: 2
- Views: 2335
Silver powder recovered from metal displacement reaction
Hi All
We have just done a metal displacement experiment with Yr 11 chemistry. I have recovered a whole lot of silver power and have dried it out. Is there an easy and safe way to heat the silver powder to create a solid silver bar or nugget?
Thanks in advance
Shell
We have just done a metal displacement experiment with Yr 11 chemistry. I have recovered a whole lot of silver power and have dried it out. Is there an easy and safe way to heat the silver powder to create a solid silver bar or nugget?
Thanks in advance
Shell
- 22 Jun 2020, 11:52
- Forum: Recipes and Pracs
- Topic: blood- splatter and skin safe
- Replies: 4
- Views: 3431
Re: blood- splatter and skin safe
Try steve spangler science as he has a few good recipes
- 27 Feb 2020, 13:58
- Forum: Sourcing Materials & Eq Repairs
- Topic: Bovine eyes
- Replies: 11
- Views: 8498
Re: Bovine eyes
I buy all my dissection specimens from dissection connection. Bovine eyes I have never had an issue with, nor has any Teacher complained about cloudy lenses. They are vac packed pretty much straight away then frozen. I used to buy fresh from the butcher but every time I went to pick them up they had...
- 13 Nov 2019, 12:48
- Forum: Biology, Physics...
- Topic: Bell in a vacuum
- Replies: 9
- Views: 11882
Re: Bell in a vacuum
We just use an old style alarm clock, the one with the 2 bells on top. Most department stores sell them. https://www.google.com/search?q=alarm+clock+with+bells+on+top&safe=strict&rlz=1C1CHZL_enAU690AU690&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjl9Z2slOblAhWVbisKHcCECBAQ_AUIEigB&...
- 03 Sep 2019, 10:43
- Forum: Jobs Forum
- Topic: Jobs part time or full time or looking for work
- Replies: 33
- Views: 51671
Re: Jobs part time or full time or looking for work
If anyone is looking for some part time work please contact Robert Capizzi. Details below
- 15 Aug 2019, 14:56
- Forum: Free classifieds - 4 sale/swap/wanted/giveaway
- Topic: Stick Insect eggs
- Replies: 20
- Views: 21304
Re: Stick Insect eggs
Hi Macca
Sent you a PM
Sent you a PM
- 08 Aug 2019, 12:38
- Forum: Sourcing Materials & Eq Repairs
- Topic: Potassium permanganate crystals
- Replies: 4
- Views: 5420
Re: Potassium permanganate crystals
Chemist warehouse usually stock this
- 06 Jun 2019, 15:09
- Forum: Recipes and Pracs
- Topic: reproduction prac
- Replies: 2
- Views: 4888
Re: reproduction prac
Try dissecting a cherry tomato. See the image in the link below (scroll halfway down). Good for ovary etc
http://www.geochembio.com/biology/organisms/tomato/
http://www.geochembio.com/biology/organisms/tomato/
- 16 May 2019, 14:44
- Forum: Free classifieds - 4 sale/swap/wanted/giveaway
- Topic: Marine Science Textbooks
- Replies: 1
- Views: 8256
Re: Marine Science Textbooks
Hi Rosemary
I sent you a pm. We have a marine science class so would be interested to see what resources you are giving away.
Michelle
I sent you a pm. We have a marine science class so would be interested to see what resources you are giving away.
Michelle
- 03 Oct 2018, 10:27
- Forum: Announcements
- Topic: Welcome back everyone to chemtalk
- Replies: 26
- Views: 24317
Re: Welcome back everyone to chemtalk
Hooray. g
Great to have this site up and running again. Thanks Westlab
Great to have this site up and running again. Thanks Westlab
- 13 Jun 2018, 11:52
- Forum: Chemistry and Labware - General
- Topic: Dehydration of sugar using sulfuric acid
- Replies: 23
- Views: 14666
Re: Dehydration of sugar using sulfuric acid
I do ours in a tall beaker inside the fume hood. I think we only use about 20g sugar and about 50ml of sulphuric acid. the trick is to stir vigorously, you will feel the beaker start to heat up. we keep stirring until it is rather warm and then leave it. you will see it start to steam a bit and then...
- 14 Feb 2018, 13:56
- Forum: Chemistry and Labware - General
- Topic: Phenolphalein
- Replies: 3
- Views: 4032
Re: Phenolphalein
Recipe we use is dissolve 2 gm phenolphthalein in 600ml ethanol. make up to 1L with distilled water. Filter.
Students get a dropper bottle of this solution which is safe for use 7-12
Students get a dropper bottle of this solution which is safe for use 7-12
- 07 Dec 2017, 09:37
- Forum: Biology, Physics...
- Topic: Preserved Animals
- Replies: 10
- Views: 8229
Re: Preserved Animals
We bought 10 cases of these from Haines. The kids love them.
https://www.chemtalk.com.au/viewtopic.php?f=26&t=451/index.php/ani ... imens.html
https://www.chemtalk.com.au/viewtopic.php?f=26&t=451/index.php/ani ... imens.html
- 07 Dec 2017, 09:32
- Forum: Recipes and Pracs
- Topic: lolly chromatography
- Replies: 7
- Views: 5610
Re: lolly chromatography
M&M's much better than smarties
- 04 Dec 2017, 08:04
- Forum: Chemistry and Labware - General
- Topic: multi- well glass tiles
- Replies: 10
- Views: 6468
- 07 Nov 2017, 13:15
- Forum: Safety with Chemicals
- Topic: When does a risk assessment need to be done?
- Replies: 26
- Views: 13847
Re: When does a risk assessment need to be done?
I always tell my teachers no risk assessment = no prac. It didn't take them long to realize that I meant it. It helps also to have a coordinator that is on board and backs you up. I also stated the personal and school fines that could be imposed on them if there was an accident. Don't have any probl...
- 16 Oct 2017, 13:59
- Forum: Safety with Chemicals
- Topic: Aprons or Lab coats
- Replies: 10
- Views: 5509
Re: Aprons or Lab coats
Hi Elizabeth
We have lab coats and a great lab coat rack bought from Westlab. Things you may need to consider are: if you buy cotton do you have access to a washing machine/dryer at school? Rubber ones you could at least wipe down after dissections.
Shell
We have lab coats and a great lab coat rack bought from Westlab. Things you may need to consider are: if you buy cotton do you have access to a washing machine/dryer at school? Rubber ones you could at least wipe down after dissections.
Shell
- 16 Oct 2017, 11:39
- Forum: Safety with Chemicals
- Topic: Chemical Stocktake in a Catholic School
- Replies: 5
- Views: 3723
Re: Chemical Stocktake in a Catholic School
I work in a catholic school and we have to do our stock take on chemwatch. I have all chemicals (haz and non haz) on the chemwatch manifest so I can print it out and then physically take the list to the chemstore to do the stock take. I don't have any of my made solutions or dropper bottles on this ...