Australia's Science Forum

Hi the shelves here in the chemical store are 900mm[W] x450mm[D] made of a very dense particle board with a timber face. Some of the shelves are damaged from corrosive attack and designated for replacement. To limit further damage I am using old McDonalds customer trays, I figure if they meet there ...

Hi Ian standardised solutions should be checked prior to there use and then every fortnight standardise NaOH solutions against potasium hydrogen pthalate dried @ 110 O C for 2/3 hrs a known weight of 0.5 - 0.7g --> should give a titration of approx 25ml for a 0.1M NaOH phenolphthalein indicator this...

Hi Waddle
thank you
regards Juliem

Hi Ian
as a one off or a prac demo
fudge
prepare 1litre of the 1M NaOH + HCl[even more preferable and typical of titration Yr12 pracs is o.1M NaOH + HCl]
then do a few trial and adjust with the 1Litre solutions
regards Juliem

Hi Lizzie some years ago I made a 'demo model' using a glass jar that was narrow but wide[ it needs to be quite retangular in shape] and about 1litre I dissolved a very small amount of sulfur in ethanol/or methanol?? then dilute this in water in the jar, this formed a colloidal suspension that when ...

Hi to all you may notice that it will be very difficult to purchase junket tablets, the major supermarket chains no longer carry this line of product as a result the company is no longer producing the tablets However due to the constant inquiries from customers, including from schools requiring junk...

Hi Mother, the biology teachers[3] are about to do this prac with potatos as they have without any problems for many years the students cut small pieces with the largest cork borer and then take 0.5, 1.0, 2.0 cm slices to use i make fresh 3% peroxide solution, diluting fresh 6% then they follow the ...

Hi Dee,Physics One, m & everyone there is no immenent pick up of chemicals from the DET however for those in Sydney you can access a free disposal of most of your chemicals through the CLEAN OUT collections organised by the Dept of Environment and Conservation for further info http:/www.<URL rem...

Hi Kim
thank you, I took your suggestion and emailed Lisa Burton and hope I get a response
regards juliem

Hi to all
and a big ask
Science is adding Earth & Environment Yr11-12 as a course next year and it's been a few years so
are there any interesting, different & creative pracs that work well for this subject
THANK YOU
juliem

Hi Kate
I often have luck by running very hot water over the stopcock for a few minutes, then pour a few drops of cooking oil around the wide rim edge having the stopcock sit upright to allow seapage Have patience and check after a couple of days
regards juliem

Hi
lights and fans and heaters or many appliances that are used seem unable to switch themselves off
as 'not me','nobody' & 'somebody' are the real culprits for global warming, water shortage, resources diminishing and eco vandalism
from the soapbox
juliem

Hi Rainbow-sky no i haven't seen the doc but i didwatch the Andrew Denton interview with Al Gore and as to the inspiring the school staff and students optomisim comes in short supply have you a copy of the DET Water Quality HSC Chemistry disc can be supplied from kathy.driscoll@sca.nsw.gov.au she is...

Hi Lorrae like you I managed to have 4 trays 'dissapear' on me - 3 classes - not enough 0.1m NaOH - I made them in aluminium trays which reacted with the alkaline gel so now I definately use plastic very clean well rinsed trays and a different recipe hope this helps 450ml deionised water heat to abo...

Hi Robbie You can manipulate the inventory in many ways depending on what type of print out you wish to start after completing the inventory and calling it CStore??? MAKE A COPY - from experience you do not want to stuff around playing with the original open the copy and from the interface select th...

Hi Carol
can you elaborate on why you need crude oil and what type of crude oil it should be ie petroleum or some other type
regards juliem
try this site for limited info help
http://www.greenhouse.gov.au/lgmodules/ ... ning7.html

Hi Sandra The science faculty had a new fume cupboard installed last year by Kemproof Industries Pty Ltd it took a while but they eventually came back to certify the unit checking airflow , gas and power, the certification sticker is attached to the front shield There contact is ph (02)9982 4311 or ...

Hi Estelle

try Sally Bannerman, Schools Animal Welfare Officer ph (02)9886 7426
this was from a Memo 9th March 2005 DN/05/00100

regards Juliem

For all those
doing the Forensics Prac
ARE YOU USING BLOOD -please ref CSIS
therefore is Luminol necessary
an alternative is red jelly and ph adjust then use an indicator
juliem

Hi Sam
my school email address is
julie.a.marshall@education.nsw.gov.au
the private message didn't arrive
regards juliem