Australia's Science Forum

After all these years I'm finally able to have the bench tops in the Prep Room replaced. :thumbup: If anyone has had theirs replaced recently I would love to know what you chose and whether you are happy with it. Anything 100% stain resistant and chemical resistant would be perfect but I guess there...

Last year we had the Board of Studies inspectors come to check the school for our 5 yearly accreditation. The main things they looked for in Science were the coloured dots and labels on the chemical bottles and the lip on the edge of the shelving in the chem store. They also asked about the school's...

I should have added HSC for the Conquering Chemistry books.

Thanks anyway John but we really need the 3rd edition.
I've given you some karma for your trouble.

Cheers
Judy

Does anyone have ScienceWorld 9 (Stannard & Williamson) 2nd edition texts they would be willing to sell?
We need a minimum of 5 copies.

Also Conquering Chemistry 3rd edition - we need 2 copies.

Please if anyone can help I'd love to hear from you.

Thank you
Judy

The aprons from Apron Makers are much better than the fabric variety. They are are acid proof & very durable, in 3 or 4 years I haven't had to replace any. They do look a bit dowdy (grey) but are a really good investment. I just give mine a wipe over every now & then with a damp cloth. :thum...

Could I trouble you for a copy as well please.

My Fax # is 02 6772 5697
Attn Judy- science

Thanks Robyn

Tammy, I'm pretty sure I bought my solutions from Haines Educational. They are manufactured by Hanna Instruments Pty Ltd. 18 Fiveways Boulevarde Keysborough Vic 3173 Ph 03 9769 0666 Fax 03 9769 0699 http://www.<URL removed, see forum rules> Electrode cleaning soln - HI 7061 Electrode storage soln - ...

I've received the fax.
Thanks Sue. Much appreciated.

Cheers
Judy

I live at Uralla and I didn't notice anything unusual.
I'd be interested to hear how far it extended.

Judy

Could I please have a copy as well.

My fax # is: (02) 6772 5697

Thanks Sue, much appreciated.

I've also heard about the peppercorn infusion & will give it a go next time.(If I can find the recipe!) We do both experiments Ian, but for different years. The prac using filter paper circles soaked in different antiseptics is one we do with Y9. Usually Betadine, Dettol, Honey & Tea Tree Oi...

Hi Pommy,

We've been using Mastrings from Southern Bio for a few years now with no problems at all.
I store them in the fridge & the last packet of 50 I received lasted for about 3 years.

Good luck
Judy

Barb, I have a recipe for screened methyl orange that we use regularly. Methyl orange - 1.0g Indigo carmine - 2.5g Dissolve powders in 1L distilled water. Filter before use. pH range 2.9 (purple) - 4.6 (dark green). The colour change is much clearer than normal methyl orange, though the shelf life i...

Perhaps Nicole means silicone putty aka sili putty or bouncing putty.It behaves like a solid as well as a liquid. We have some here that was purchased from Govt Stores many moons ago. I think one of our teachers made slime recently that had similar characteristics & I could get more info if requ...

So does that mean !5% ammonia soln has a molarity of 7.98?

And does anyone know the concentration of "strong ammonia solution" - syn liquid ammonia forte?

Thanks in advance
Judy

Rosalie,

I used soluble starch last week but I don't think it really matters which one you use.
I mix the powder into a slurry with a little cold water then add boiling water, but you could also use a microwave.

Good luck with that prac
Judy

I did try the wrong amylase after all.
Thanks everyone for your help.

Cheers
Judy

Hi Liz, I've printed it out for my recipe file & given it to the Bio teacher too. The prac is for this afternoon & I won't have time to prepare the egg suspension, so we'll just go with the amylase this time. I will definitely be ordering fresh pepsin for next year. Do you know the differenc...

We've never done the egg white & pepsin prac here before.

I'd be grateful if someone could please fax me a copy. Our # is 6772 5697

Thanks so much
Judy

Thanks Lada & Rae,

I have tried amylase once before, but I'll give it another go.

Cheers
Judy