Search found 706 matches
- 23 Feb 2024, 10:41
- Forum: Biology, Physics...
- Topic: IEC Kundt's Tube Apperatus
- Replies: 7
- Views: 389
Re: IEC Kundt's Tube Apperatus
Another problem my wife had commented on was that the Students had found it difficult to relate the diagrams of Nodes and Anti-nodes in the IEC manual to the way the equipment was set up . IE the closed end in thebook was on the Left , while the apperatus is setup with the closed end on the right . ...
- 23 Feb 2024, 10:26
- Forum: Biology, Physics...
- Topic: IEC Kundt's Tube Apperatus
- Replies: 7
- Views: 389
IEC Kundt's Tube Apperatus
We bought one of these several years ago . The teacher said it did not work .Some results were OK on the Open tube tests but it was useless on the closed tube tests . At the time , I remembered realising that the speaker in it was really bad at low frequencies and next time , it was used with a bett...
- 22 Nov 2023, 16:46
- Forum: Miscellaneous
- Topic: Attachment - how to add
- Replies: 2
- Views: 6277
Re: Attachment - how to add
Hi Kimmy What kind if attachment are you trying to add ? If its a picture , here is a “how to” I posted a while back . Always remember that to add an attachment , you must click the “Full Editor & Preview “ button at bottom first. I forgot to add that very important step at the start of the inst...
- 12 Oct 2023, 09:58
- Forum: Chemistry and Labware - General
- Topic: Dresden ??? jar
- Replies: 6
- Views: 2902
Re: Dresden ??? jar
I would love to see a pic of the top and also of the rubber bung removed to have a better look at it but, I think the name is Dreschel Bottle It also seems to be called a Dressel bottle and a Drechsler bottle It is a Gas washing Jar as far as I can tell . Drechsler.jpg The inverted level marks I thi...
- 11 Oct 2023, 12:46
- Forum: Chemistry and Labware - General
- Topic: Dresden ??? jar
- Replies: 6
- Views: 2902
Re: Dresden ??? jar
Its a curly one mtg. The upside down measurements are unique. I even tried putting it into google image search. Best I could find was an image on something similar .It was used in early Blood transfusions .May not even be close . IMG_8863.jpeg I found a similar new glass product called a glass buffe...
- 11 Oct 2023, 10:38
- Forum: Forum Support Desk
- Topic: How to post a picture on Chemtalk
- Replies: 8
- Views: 11537
Re: How to post a picture on Chemtalk
If you are posting Pics from an Iphone , you will still need to resize pics first .( I'm sure there would be an android version too) I have a free app called "resize It " .It is also handy for rotating pics that appear sideways when you post them . The trick for sideways pic is to click o...
- 05 Oct 2023, 10:58
- Forum: Forum Support Desk
- Topic: How to post a picture on Chemtalk
- Replies: 8
- Views: 11537
Re: How to post a picture on Chemtalk
If you are posting Pics from an Iphone , you will still need to resize pics first .( I'm sure there would be an android version too) I have a free app called "resize It " .It is also handy for rotating pics that appear sideways when you post them . The trick for sideways pic is to click on...
- 05 Oct 2023, 10:47
- Forum: Chemistry and Labware - General
- Topic: Dresden ??? jar
- Replies: 6
- Views: 2902
Re: Dresden ??? jar
Here's one I prepared earlier mtg :thumbup: How to post a Pic on Chemtalk Forum Don't forget the bit about Clicking "Full Editor and preview " button first . EDIT: Was wondering if it maybe a Leyden Jar you were thinking of ? The very old ones were Glass ,foil or metal on outside .Either f...
- 07 Sep 2023, 10:15
- Forum: Announcements
- Topic: Short term job in Queensland
- Replies: 3
- Views: 3112
Re: Short term job in Queensland
Thanks Labbie .Alas it’s a bit too far south than me .
- 24 Aug 2023, 19:33
- Forum: Chemistry and Labware - General
- Topic: Chemical disposal
- Replies: 3
- Views: 2458
Re: Chemical disposal
Welcome to Chemtalk Briony.....First post . Glad to see the Good Ship MHS is in good hands and you are keeping the Bastards honest :D SAM must have been wondering why I had been stockpiling so many Chemicals :cheesy: ....I don't think we even had 1/2 a tonne all up . Even a prorata of 500kg for $5k ...
- 04 Aug 2023, 18:56
- Forum: Sourcing Materials & Eq Repairs
- Topic: refraction semi circles
- Replies: 5
- Views: 2770
- 04 Aug 2023, 11:39
- Forum: Chemistry and Labware - General
- Topic: Year 10 DNA Pracs.
- Replies: 24
- Views: 11843
Re: Year 10 DNA Pracs.
We did Rosalie , but maybe our kids were too aggressive as we only got one reuse out of them before they started blowing out at the edges . In the end , Head Teacher said not to reuse them .
- 27 Jul 2023, 14:56
- Forum: Chemistry and Labware - General
- Topic: Ammonium Phosphate?
- Replies: 12
- Views: 5841
Re: Ammonium Phosphate?
Bit late to the party , but to answer the OPs question , di-Ammonium phosphate is what is used in wine making and in distilleries . It is commonly called DAP .
- 28 Jun 2023, 12:33
- Forum: Chemistry and Labware - General
- Topic: A suitable demo?
- Replies: 10
- Views: 3711
Re: A suitable demo?
Sometimes you just have to have a go and see how bad can it be .Nobody said “don’t try this it at home “ so he we go. Half a teaspoon of Salt and 5mls of Metho .Stirred in a standard old Drinking glass , not even a borosilicate Beaker , it may crack . IMG_8203.jpeg Lighting stick? Guess thats a safe...
- 22 Jun 2023, 21:57
- Forum: Miscellaneous
- Topic: Teachers
- Replies: 3
- Views: 3637
- 19 Jun 2023, 12:14
- Forum: Chemistry and Labware - General
- Topic: Using weight to find volume
- Replies: 3
- Views: 2320
Re: Using weight to find volume
Actually sounds like a great idea Marama :thumbup: I was wondering how much the temp of the water would throw the accuracy (as density changes with temp ) , but it looks pretty damn good up to at least room Temp .But at higher temps it is still significantly more than glassware . °C .0 .1 .2 .3 .4 ....
- 15 Jun 2023, 14:25
- Forum: Sourcing Materials & Eq Repairs
- Topic: storage of pH meters
- Replies: 2
- Views: 2780
Re: storage of pH meters
I made up some little wooden holders after the kids kept knocking them over in the Labs and spilling the Storage juice .Also put a little warning notice on it .
PS , thanks Briony for sending me a pic .
PS , thanks Briony for sending me a pic .
- 08 Jun 2023, 13:18
- Forum: Sourcing Materials & Eq Repairs
- Topic: Bromine
- Replies: 9
- Views: 3423
Re: Bromine
Good to know Macca,
I tried a similar method
viewtopic.php?p=47842#p47842
viewtopic.php?p=47854#p47854
I tried a similar method
viewtopic.php?p=47842#p47842
viewtopic.php?p=47854#p47854
- 08 Jun 2023, 12:45
- Forum: Safety with Chemicals
- Topic: Radioactive isotopes
- Replies: 17
- Views: 7784
- 07 Jun 2023, 16:48
- Forum: Safety with Chemicals
- Topic: Radioactive isotopes
- Replies: 17
- Views: 7784