Australia's Science Forum

I've missed the email-out as well.
Can"t make it this year, hopefully next year.
Please add me to the email list.
jbotto@parra.catholic.edu.au
Thanks.

Thanks everyone for your input.
My NaOH pellets are dry so I ruled out storage issues.
JelJane, I like your explanation & I'm relieved to hear I'm not the only one who has come across this.

I just tried again using NaOH kindly donated by another school. Problem still persisting. Funny thing is, when diluted down to a 0.25M solution it is holding the correct colour. I've ruled out glassware contamination. Air contaminants? OMG! I'm breathing the same air so I hope not. Grrr! trime to or...

Our 2M NaOH solution has everyone including the Snr Chem teacher baffled. When universal indicator is added to it, the solution turns purple (as expected) & then changes to a teal colour (~ph8) within minutes. I've tried making fresh batches with distilled water, tap water, different batches of ...

Hi Lada,
I'd love a copy of the the titration prac as well.
Using the crucibles has always been a hit or miss. It was greatly improved last year with the use of gooch rubber sleeves but still doesn't solve the washing up issue.

Please send to fax: 02 9684 2120 Attn: Josie.

Thanks.

What? Your teachers leave things behind?? I've made up cards that read "Please Leave" and "Finished". The theory is that if they want glassware and/or equipment left, they place a "Please Leave" sign with it. If they don't do this or forget to leave a "Finished&quo...

Hi,

I've used agapanthas for this application. Like iris leaves they are easy to tear longways.

Cheers Josie