Australia's Science Forum

Duh!!!
I thought the rubber on end was to protect delicate hands

Easier methord
Dissolve 1g in 75 ml of commercial Ammonia solution and add 25ml of ethanol.
From Heinemann Chem Prac Manual

I was boiling up some water to make a solution in 3L beaker about 2 years ago' as I lifted the beaker off stove the bottom of beaker just dropped out, Filled my shoe with boiling water, Ouch, then I looked at why this happened all my large beakers scratched around bottom from stirring with glass sti...

Don't you love it when people tell you what you should have done!
I've been busy as all this year, but, this week Yr 12 Retreats & yr11 exams
I,ve got everything cleaned up, and it's only thursday.
Thought I would visit forum have not been for long time!

I don't want to rain on your parade, BUT there is basically 2 parts to a balance 1. The load cells, if the balance landed pan side down they have probally "had it" 2. The electronic slope board. If either of these have gone you will get the answer, "uneconomical to repair" Lifes ...

Another Question
Is there a differance in Molarity between Glacial and plain ethonic acid or they just shortcutting name?

To calibrate probes you should have two adjustment screws 1 marked Zero and one marked Span Set in 7 buffer adjust zero to read 7 set in 10 buffer adjust span till read ing 10 then keep repeating this process till both right because zero will move slightly when you adjust span but you will get the f...

It is now illegal to sell elodea in NSW.
Pink baby tears - "Rotala Rotundifolia submersed" is an alternative.

At least in NSW elodea has been declared a pest weed
thus not for sale in aquarium shops
but an alternative, is a plant called "pink baby tears" by the local pet shop.

Hey Nicky are you sure they are not lumps of undisolved agar? I always sprinkle in agar till no more will disolve then skim surface to remove any lumps

If the barrel will not un screw then warm thread section in flame of another, usually it is wax dripped down inside then you can insert screwdriver shaft in through air holes and unscrew your industrial arts section will have cleaners for oxy cutting torches you willfind a suitable size to clean jet...

Once I did a prac where we used an artist brush to paint a quarter of surface with Dettol, and another quarter with bleach than when dry, applied bacteria with loop the half untreated was control while the other 2 quarters compared bleach and dettol
Hope that's clear

Ours are keept in drawer but every time i visit a St. Vinnies etc I keep my eye out for plastic drawer inserts designed to hold knives, forks & spoons this stops problem.

Phosphorus in the past was often stored under water as a satety measure!
Just use a spatula to scrape some from bottom and place on watch glass to air dry "should not be a problem this weather"

Have you approached supplier / Gilcron?
Sounds like too much voltage on lamps, Should be 24 Volts but they should be under warranty, contact Gilcron

Over the Hols went to Canberra to Egypt exhibition
They had a couple of mummified cats.
Couldn't smell anything He He!

Store in freezer, it will go colourless! then bring back to room temp. return to brown (reversable reaction)
doesn't answer your question about storing regulations but who will know out-of-sight in freezer. out-of-mind
Merry Christmas

Try rinising with acetone / proponone

I have no trouble doing same expt. using geraniums and once ground up red flower with leaves and brilliant results with pink seperating from green.

Hey Robb I think you were confused on first post, ( refracted light parallel to incident light) is for prism. for lens Light passing from less dense to more dense medium is refracted towards the normal (Perpendicular line to tangent) thats air to glass then from glass to air is refracted away from n...