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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 . ...

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...

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...

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...

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...

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...

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...

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...

Thanks Labbie .Alas it’s a bit too far south than me .

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 ...

Anna Z wrote: ↑04 Aug 2023, 15:20 Could you borrow them from another school whilst waiting on ordering them ?

LOL, I remember being asked to buy these . Then they never got used . I know one school that has them sitting there doing nothing .

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 .

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 .

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...

judy2018 wrote: ↑22 Jun 2023, 10:59 Hi All
Do teachers have to do a RISK ASSESSMENT for all EXPERIMENTS ?
Thank you
Judy

In NSW , as long as they follow the requirements of the CSIS , then they are .

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 ....

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 .

Good to know Macca,
I tried a similar method
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macca wrote: ↑08 Jun 2023, 08:39 Bottle of Black Douglas would be lovely lol

Done ......if you still are chucking them

Anna Z wrote: ↑07 Jun 2023, 15:50 I'll pay you $20 towards beer for you...send them down here

$30 ....and the beer