Australia's Science Forum

Hey! that Autoclave Indicator tape is really great! 8-) One of our teachers is moving on at the end of this term to take on "Head Teacher" at another school. I came in after recess to discover that several of his big packing boxes were very securely taped up with Indicator Tape!!!! (at $22...

Serrata sell an Activated Carbon filter (for abour $64 and a Mixed Bed Resin filter for about $85. My understanding is that you need BOTH. The charcoal filter removes sediment, chlorine and organic compounds and the Resin filter removes "ionised disolved solids and gasses" (hence "De-...

I would have thought that you would EITHER add tin to HCl to get Tin Chloride (Acid + metal gives salt + water) OR add SnCl 2 to distilled water (19g/L). Why would you do both? Doesn't SnCl 2 dissolve in water Robb? Tin is an "Active" metal, so it should "like" to go into solutio...

Would I be cynical in suggesting that perhaps the Gov't Grants do not come through until the beginning of the year and so in November/December ANYTHING that costs money would be unsuitable according to a business manager! I was told this morning that our "Books are Closed" and I am not all...

Is that just for Nitric Sue? Our 32% HCl come in a plastic bottle. For that reason, I have often put HCl of various strengths into the empty "shipping" bottles.

Ian

What about "Swimming Goggles"? They come in all sizes and are readily available and fairly water/splash resistant.

Ian

Narelle, Our Vertex was $685 from Serrata about a year ago. Ours is a bench top model. I just plug it in when I need it They have an "Under bench" (permanantly connected) model for about $885. There are two filters which cost $85 ans $64 each, which , I guess, need to be replaced every now...

If the filter is recently purchased, as you have said, it should not need a filter replacement. Did you double check your pH reading? Did you use pH test paper or a data logger type probe to test it? Except for our very new probe, I do not trust the old ones that have been sitting on the shelf for a...

Am I on the wrong track here?
Page 132 of "The Laboratory" says that Methyl Orange is red at pH 2.8 and yellow at pH 4.6
Is that what you are after?

Ian

Yep. Ferrous is Iron II. At least that is what it says on the lable. I can't see it as being substantially worse than Ferric Chloride, so Green it is, then!

Thanks all for your help!

Ian

Hi All, I have just unpacked a bottle of Ferrous Chloride, but I can not find it in the "Appendix D" bible. Ferric Chloride is there, and is a Green Dot. Does any body know what colour dot goes on Ferrous Chloride? (I don't expect anybody OUTSIDE NSW to understand this e-mail! It is just a...

Hi Nicole,
I'm not sure that I can help you, but can you tell me what exactly is "resistivity putty" and what is its use?
regards
Ian

Lisa, I was looking at the catalogue from "Science Supply Australia" Education Catalogue '06/'07 They are at web: http://www.chemtalk.com.au/viewtopic.php?f=26&t=451 Phone: 1300 857 544 Fax: 1300 857 533 Mail: PO Box 465, Glen Waverley, Vic 3150 It is always good to have another catalo...

That helps a lot Sue. You are a wealth of information! I don't know what we would do without you and Robb!
Thanks again

Ian

Hi all, A question for the Chemists among us (of which I am NOT one!!) My Chemistry Teacher asked for some Ammonium Phosphate as an ingredient for a fermentation prac, making ethanol. I could not find any Ammonium Phosphate on the shelf, so he had to go without. (experiment worked any way). When I w...

...Or the ones that turn the Air Conditioner down to 16 degrees on hot days! Crikey! if the poor machine can't get the temperature from 35 down to 25, then it sure won't get it down to 16!!! ...or the ones that turn the A/C's down to 16 and then open up all the windows so that the "through bree...

We tried the AusPen refillable whiteboard markers. Trouble is, that as they start to run out, the teachers just PRESS HARDER, so that, by the time they are returned for re-filling, the nibs are shot! I don't know if the nibs are replaceable, but last order, I orderedPilot "Wyteboadrt Marker&quo...

I, too treat both Silica Gel and Cobolt Chloride paper as a renewable resource. I dry them both out in the incubator untill they are blue. Blue, good: Pink, bad!

Ian

Richard,
Your new avatar reminds me of my job. I keep "pushing forward" but never seem to get any where!
Where do you get these clever little avatars from? (I had to make mine!)

regards
Ian

Wow, Dolphinscales! I will have to work out a way of hiding your post from my HT. You will get me sacked!

regards
Ian