Australia's Science Forum

Thanx BBB

Teacher wants it for students to observe colour.

How much HCl and KMnO4 will I need to fill 1 gas jar? (as per p40 The Laboratory)

I've done it once myself and a teacher did a demo outside. Don't do it on a rainy day. Method in CSIS Appendix F under 'Aluminium'.

You lucky duck! All the best, Sue.

Are the new bunsens for use with natural gas (should have letters NG on base)? They have different jet to the LPG burners.

I purchase most of the groceries and abattoir items, scan receipts and lodge requisition form online - reimbursed into my bank account. Record all trips and claim on tax. Most chemicals from the usual SSA, Westlab etc.

We've got one, called Solar Airship (supplier unknown) which came with kite-line and handle. Works well in the morning.

Insist on teachers putting in risk assessments for pracs. If the activity is not compliant with CSIS, eg. a chemical is inappropriate for the year group, don't sign (if using RiskAssess). We can't manage the lab if teachers are helping themselves to the resources. If your HT doesn't accept this, may...

I give them H2SO4 in a capped bottle in a beaker with a plastic Pasteur pipette.

Anyone know where I can get trays for a Gratnells A3 trolley?

I don't like spray bottles because reasons stated by others, plus kids manage to extinguish the Bunsen flame. The IEC flame spectrometer is good for demos.

I put a magnetic stirrer in a beaker of water and mix for about 20 minutes.

Hi Bec. I started using Chemwatch but switched to RiskAssess when became available because you can generally enter whatever molarity or %age you want, but not with iodine for reasons unknown. So sometimes I check with Chemwatch if not happy with RA.

Used TLC extensively in toxicology lab (1990s) for drugs of abuse screening. Plates were approx. 20 x 10 cm and we ran 20 samples plus controls on each plate. Plates were run in ethyl acetate, dried then viewed under UV lamp and sprayed with various chemicals to show up +ves.

The road to my school was cut by floodwaters this a.m., had to take the long way around. Waiting to hear of possible bridge closures at Windsor and Richmond - half the Science Dept. including myself live on the other side of Hawkesbury River.

I used Chemwatch for Universal Indicator Solution.

RiskAssess GHS labelling much easier to use than Chemwatch; just enter chemical name, choose label size (choice of 4), choose solid or solution; if the latter, enter molarity then download and print.