Australia's Science Forum

Hi Guys Does anyone know how to test the melting point of lauric acid. Would I by any chance put it in a test tube in a water bath and then when its melted pop a thermometer in and get the temperature at which it soldifies. Thats working backwards I guess. Can anyone let me know the way they do it. ...

Hi
we use white carnations. They work really well, gets results within a few hours. we also split the stems up to 5 ways and put each bit in a test tube of food colouring.

Off the hook. Just showed the teacher what 199.926g of aluminium sulfate looks like and thats the amount for a 300mL solution that she wanted and she realised this probably can't be done. I live to fight another day YIPPEE.
Cheers
Krysia

I need to make 1M acidified aluminium sulfate. Okay the 1M solution is not a problem, What I nedd to know is do I acidify it with sulfuric acid. If so is it concentrated and how much for a 500mL solution. Thanks in anticipation.
Krysia

Thank you guys I feel alot more confident with you all out there somewhere. Rosalie we have it delivered because the teachers like doing the dry ice demo's. We have a snowpak attachment that when attached gives about 100mL. The kids think its all very special.

Hi Everyone Hope you all had a lovely weekend. I've just had delivered a new CO2 cylinder. I asked the delivery fella if I stored it flat or upright. He says flat. I just thought I'd check the MSDS as he wasn't very convincing with his answer. The MSDS says to store it upright. What does everyone el...

H All This prac has been giving me grief ever since I started working here. I wrap the end of a thistle funnel with dialysis tubing and fill with a coloured sucrose solution. It's not supposed to come out but it drips out like there is no dialysis tubing. The teacher concerned keeps saying " th...

Hey thanks for all the ideas!!!!!!!!!
I just followed your instructions Ocker and its works just beautifully. Knew I could rely on you guys (my saviours).
Thanks a mill.
Krysia

Me AGAIN!!!!!!!!!! One of the chemistry teachers here is asking for 1-bromo-butane and 2 bromo-butane. I've rung a few suppliers and can't get it so she has suggested I try making it. I would put the shocked smilie here if I knew how. I did a quick internet search but haven't found anything yet, tho...

Hi
One of the teachers here wants to do a prac where two sound waves cross so cancel each other out, the noise fades in and out. Does that make sense? any ideas how I could set this up?
Krysia

Good Morning Thanks for the replies. Kiah that's great to know you're happy with that. The Architect told the school to order the $11,500 model which made the business office panic. I'm sure that one would be fantastic, its got a dryer that dries all the pipettes and burettes inside and out but that...

Hi I just put a post about this under the welcome back everyone topic accidentally. Sorry We are in the process of ordering new stuff for my brand new very prep room, I'm very excited. I've been asked to pick my new dishwasher. Has anyone any advise on what type is good. The office has suggested a L...

Hi
I'm probably way behind the times but was reading the old flame test posts and discovered Ocker is using the same method as me with the soft drink bottle. It really is great and there is very little mess afterwards. Does anyone else use strontium chloride, thats my fave.
Krysia

Happy New Year Everybody Hope you all had a safe and restful holiday, now its time to put on our running shoes. I look forward to reading everyones wonderful news from over the break. congratulations!!!!! to all you happy noona's how very sweet it is. I got a baby of my own over the break, a golden ...

Hi Everyone I've just had a guy come and collect the waste. I was gobsmacked when my carefully labelled and packed box of flammable liquids in glass bottles was picked up and hurled a great distance into the back of a truck atop a mountain of otto bins. The same company last year sent a bloke with u...

This picture inspired me to have a go at this prac. but my result wasn't nearly as spectacular as the one in the first photo. Now I've got to clean it up. Am I able to wash this down the sink. I think I should be able to. I did it with a 2M sol of Na I and the second time with solid K I. Worked bett...