Australia's Science Forum

There is a very simple way to clean iron filings from a magnet. Use a brush from a dustpan and brush set. Just keep brushing until they come off. The last few tiny pieces can be picked off by hand.

If you hold the glass directly surrounding the tap you can give the end of the tap a little tap with something like a rubber stopper or similar. This is a bit riskful of cracking the voltameter but it may worth a try if all other methods fail.

There is too much current passing through the lamp or the legs of the lamp have a short circuit. Do have the correct voltage lamp?
I would call Gilkon (02)9914 0900

I also had the same problem too. It seems to be that the first few batches of water with a new cartridge are no good. It may be due to that the beads in the cartridge need to be wet for some time before they fully activate. What I found was after a few batches the water quality improved. I got it do...

I have also heard that they are reviewing the chemical safety package. Part of that review could include whether to have another chemical collection. If not our school has had a quote from Plastech, Gerald ph9623 0888. You must have a lot of waste to get a quote of $3000. My school had only $114 wor...

Ammeters have protection diodes that can burn out when they get too much current. Replacing these usually fixes most of them. Ammeters also have shunts to give different ranges of amps. Voltmeters have resistors for the different voltage ranges. If you know how to use a multimeter you can check and ...

Nobles ultra pure water from Woolies supermarket. In 10 or 5 litre pack. Costs about 70cents a litre. It has a low conductivity. I use this when making 1M silver nitrate and it is perfectly clear (no cloudiness).

Deionising water is done by tiny deionising beads. It removes the ions. The best type let the water drip though the beads giving them time to remove the ions. The filter may also have carbon to remove other non-ionic impurities. A Brita water filter works on this priniciple. Reverse osmosis is a fil...

I have the same dilemma too. I am about to run out of cartridges so have considered trying the following solutions: 1) Open an old cartridge. Replace the filling with a stocking full with deionising beads and perhaps activated charcoal. I call it the do it yourself option. 2)My other idea is to adap...

Hi forum members, I use a detergent called Sonex to wash my laboratory glassware. What do you use? I am looking for something that is easily available and works well, price is no problem. The Sonex story: It was easy to get in NSW through a company called Q-stores(now called something else). They ha...