Australia's Science Forum

Many thanks Jazz
Take care
Mother

Hi there
Needing everyones help again!!!!
Year 11 Chem. students have just finished a prac. using 33% v/v ethylene glycol commercial cooling system treatment, and I'm not sure how to dispose of it.
Thanks
Mother

Hi Rosalie
I use metho for the indicators you mentioned,haven't had any problems
Cheers
Mother

Last week a year 12 student asked:"How do I use this pipette pump?" Year 12 trials begin next week!!!! Our leaders of the future,
Mother

Many thanks Jazz.
Teacher did get it wrong,she meant water hardness
Mother

I just used sticker labels cut to size.It crinkles a little,but otherwise works for me.
Cheers
Mother

Hi All
Has anyone out there come across a prac. using standard soap solution??? I think the experiment is: [*]Testing Chloride in Water Samples.[*]If you have- how is it made up???
Wait for your replies
Ta!!!!
Mother

Would all states now be back for Term 3???? Anyhow welcome back to another exciting and interesting time with chemtalk users. I really do look forward to all the questions and information. For us in NSW, this is the last term for Year 12.I for one, am going to miss them :-( Today is staff developmen...

Our Agriculture and Primary Industries faculties have their own budgets and are separate to the Science budget.The only time I have anything to do with Ag. is when they need to use a lab.for microscopes and slides and sometimes for dissections. Ag. is not associated with Science otherwise. As far as...

Serrata catalogue has vinyl tubing in 8mm size for bunsens.If you don't have a catalogue, the phone number is: 02 9651 2031 or web site: http://www.chemtalk.com.au/viewtopic.php?f=26&t=451
Cheers
Mother

Hi Gwen For safety reasons you need to use clear plastic tubing for the bunsens as the rubber tubing perishes and splits very easily.Students find it very easy to put pin holes in the tubing which is dangerous when the gas is on.The lab tech.I replaced had a very nasty experience when the gas escape...

Hi Donna This may get you out of trouble: BROMOTHYMOL BLUE Use: Indicator is especially useful for detection of carbon dioxide in solution(turns yellow) in photosynthesis and respiration experiments. Preparation: 0.1g of Bromothymol Blue powder in 1 Litre of distilled water.If solution appears green...

Oops!!!! Thought subscript would lower the numbers only.
Mother

Hi All H2O2 will convert back to H2O after a certain period of time. To test if the peroxide is still active try this: Pour a small amount of peroxide in a test tube, then put a very small amount of Manganese Dioxide powder in. If it fizzes up then it is still ok and can be used. Just be careful as ...

Perhaps you should make your Principal aware of this situation as I'm sure schools are given special consideration regarding this chemical. It is disadvantaging students who require this chemical, and others to perform lab experiments. Students are always under supervision in the labs whenever chemi...

At the Dubbo College/Senior Campus (Yrs.10,11,12) Science this year received $11,000 for Text books, Comsumables,Petty Cash and New Equipment. Text books take up most of the money though, and not much is spent on new equipment as it is very expensive.The College is just 6 years old and we received a...

Hi All I bend all my glass tubing and have some weird and wonky 'S' bends,but they all serve the purpose they are suppose to.Doesn't worry the teachers, but the students often have a laugh about the shapes. :lol: The best way to learn how to bend tubing is to practice when you have some spare time (...

Hi all
I use turps.Works well!!!!
Mother

Hi there RosalieM To bring back the green (neutral) of Universal Indicator, I mix a weak solution of Sodium Bicarbonate or Boric Acid with distilled water and then add it drop by drop until the green colour is reached.It may only take a couple of drops!!! Joh has the right idea =D> Cheers Mother

Hi there Donna
Just an hour ago I was asked if I had anything to clean super-glue off earth magnets.I wasn't certain what to use so I thought I would give Propanone(acetone) a go.It worked perfectly!!!! So you could try Propanone.

Good luck
Mother