Australia's Science Forum

Thanks Sue - I was just getting a little impatient. Judy

Has anyone in the Catholic system in NSW seen this survey yet? Still waiting!!!!! Judy

Dear Chemtalk family - Do you know if the replacement plant for Elodea (namely Rotala Rotundifolia, Pink Baby Tears - don't know if they are the same plant or two seperate plants???) Can be used successfully in the Inverted funnel with the Sodium Hydrogen Carbonate solution to collect gases? Your in...

Judy may I have a copy of the list too? Fax No: (02) 6852 3768 Attn. Judy Gould Thank You.

Any of you good folk had trouble when using narrow range pH indicator paper? Does it go "off" if stored for a long while? Last year the chemistry teacher complained about the paper "not working", so we got some new booklets however these are "not working" this year!!!! ...

Dissolve 19.4g of Potassium chromate in distilled water and make up to 1 litre. This is 0.1M strength. Acidify be adding a few drops of conc. Acetic acid. Simple as that!! Cheers. Judy.

Dear Bindi - We were inspected lasr year and the woman that came to the prep room insisted that the Bromine water must live in the Corrosive cupboard not in the Fridge as I had read in the SCIS manual!!! So it would appear that you can get into trouble just by following the instructions in the Manua...

Dear All, Welcome back to term 2, Hope you had a restful holiday. My question is aimed mainly at the Private - make that Catholic school labbies!! (private schools tend to lag behind when it comes to rules and regulations!!!!!) How often do you have a medical check up? What is involved - Numerous bl...

Hi Estelle - May I have a copy please?

judygould@redbendcc.edu.nsw.au

Managed to click myself off!!!!! Not sure if you got my message! Just in case you did'nt, could you add me to the list, thanks.

judygould@redbendcc.nsw.edu.au

Many thanks. Judy.

Many thanks Robb, Judy.

Dear All - Yr. 11 Chemistry will be decompsosing a carbonate using Copper (11) carbonate forming Copper (11) oxide and Carbon dioxide. The Copper carbonate I have on the shelf is CuCO3-Cu(OH)2 I also have "Malachite green (Oxalate)" I believe this to be Copper (11) carbonate (CuCO3) Is thi...

Thank you Barbara & Rosalie - I took your advice and checked out the previous posts on this subject and got some helpful hints. However, this time (because we were pushed for time!!!) we went with the milk from the staffroom and had reasonable success, but I think next year we might have to have...

Hi guys, need some advice! We are doing some enzyme experiments (Amalase, Trypsin) and am wondering if using the more expensive Starch and Milk powder (from Southern Biological) would give us better results, or should I just stick with the Starch and Milk powder purchased from the supermarket? Any s...

Dear Robb - Tried to send a private message - could'nt work out how to do it!!!! I know I have sent PM's in the past, but things appear to be different, so I gave up in despair (well almost!!!) So, just letting you know that the RA arrived safely, Many Thanks. What would we do without you??? Cheers....

Dear Robb - Just catching up with the RA for practicals (late as usual!!!!) I see you have already faxed off lots and lots, could I trouble you for one more copy? Many thanks. Fax to Judy Gould on 02 6852 3768. Much appreciated. Judy.

We are still using a pressure cooker in our lab (and will be for quite some time!!!!) and yes they can be rather scary!! I usually use a small piece of Autoclave Indicator tape (indicating line changes to black after sterilization) if I have been successful! Maybe you could use the indicator tape in...

Thanks Jazz, will do!! Judy.

Dear All - Need to pick brains!!!! Anyone had to standarize approx. 0.1M AgNo3? Is so, what did your standarize against and what indicator did you use? Looking forward to your reply. Cheers. Judy.

Justin - just catching up with your post of last week re Onion root tip squash using Aceto-orcein. We have not had any success with this Prac! Yes we can grow the onion roots (remove old dried roots, sit base in jar of water & wait till 1.5 - 2.5cm in length). As near to sunrise as possible - re...