Australia's Science Forum

I need to make up pH solutions 1, 9, 11 & 13.

Its for a liver/catalase enzyme prac. But dont know what to use or how to make up these pH solutions.

Would be grateful for any help asap.

Thanks

Xenon

Thank You
I didnt want to second guess myself at all, I could have been way out.

This was very helpful

R-S

Please help asap. Need to know asap If I react 4.3 g of Zinc with excess Bromine (liquid) the reaction is Zn (s)+ Br2 (liquid) --> Zn Br2 = ZnBr2 does this mean that there are TWO molecules of bromine required for every ONE molecule of Zn? and if the values of heat for the reaction are H= -329 kJ/mo...

Our students have made cells models using play doh. They are 2-D, constructed on cardboard. Is there anyway that I can stop the play doh from drying out, as it causes colour fading and cracking. Last year I tried spraying them with fine mist water (only lasts until the water evapourates). brushing w...

Thank You Narelle :D Could you please thank the wonderfully helpful people at the museum for us? I have to say that networking is a brilliant tool. We can find out anything , contact anyone on the face of the earth (and beyond! :? ) using our networks. (remember only 6 degrees removed from any perso...

Debbie

You might have to take out the prize , who knows?

excellent narelle.. thanks

Now we are all agog.

We should run a competition .

R-S

That would be great Narelle..
however its not at all essential. Someone found it and brought it into us
But everyone here is dying of curiosity

Maybe an unidentified species!

Anyone help identify this bone? We are all stabbing in the dark Was found at the highwater line on a beach on the east Coast. Its about 16 cms across The first two pics are the whole thing, the third pic is a close up of what looks like fontenels, running the whole centre of the bone, and allows for...

Anyone know how to make a superconductor model, using egg cartons and ball bearings?

I've been given some written instructions that make no sense as to how to set it up.

I’ve tried searching images and videos on the internet, but no luck.

Anyone help?

thanks Wendy

Perfect

Can anyone assist please? I dont have a colour chart for bromothymol blue.

Any one have one, or a link, or anything please?

Do a demo in the fume cabinet.
I use cold water in a steel tray.. not alumunium... use one of those geology or disecting trays.. that way.. the baby-pea /pea sized pellet of sodium can skit over the water as it burns.. quite impressive

Thats a great idea merilyn.. next disection, I plan to boil some .
thanks

Thanks debbie, nice and simple too.. suits me fine

I have 4 titrations to do to standardise 3 lots of H Cl acid, before 10 am today. I cant find my titration examples as I suspect that the folders that had all my calcs were also the ones that were boxed up and put away for the new shelves!!! eeekkk! panic..havent got time to dig for them, can anyone...

You area definant genious Sunray18

Thanks so much

I decided NOT to have any radioactive sources in our school. And on this one, what I say, goes! As I remember may years ago, I took a geiger counter to the outside of the lead box that a schools radioactive sources were stored in. The geiger counter was registering some serious clicks. compared to t...

yes, frustrating. Thanks for trying matchstick:)

I am wondering if a comprehensive risk assessment may be a way around it? Long shot though. I wouldnt like to sanction it at all! The Risk Assessment way ,you could specify controls such as no cross handling of another students , wear gloves, no opening or viewing except under fume hood conditions, ...