Australia's Science Forum

Hi All,

A better way is to put this into a fume cupboard in a stainless steel tray and allow it to evaporate on its own accord.

No further cost for disposal this way.

Cheers,

Robb.....

Hi All, What I have done in the past during my years in industry, was when this occured I always used to use "brute force".....Please dont be afraid and hear me out on this one.... I use a small piece of wood and a hammer. Hold the condenser and rest the piece of wood against the flask and...

Hi All, You people are all on the right track. Yes the s does represent "spatium" governing the distance or displacement relative to time. As Velocity is a measurement of scalar vectors. What I am trying to say is that velocity is is the change in displacement of a body divided by the time...

Hi All, The Risk phrases on some chemicals do not reflect on the label system of the DET. Some chemicals have certain dagers accociated with them but these have very low frequncies of causing these conditions. We also have to take into consideration the physical aspects of the substance. By right th...

Hi All,

I prepare the solution by adding 0.2g of the dyestuff in 15mL of triethanolamine with the addition of 5mL of ethanol.

That will get you out of trouble.

Must be doing Metal determination.

Cheers,

Robb.....

Hi All, To re-iterate Ockers post. it is advisable to use it when there is the need for it. I wouldn't/Don't use it after at least 2 days. It is too hazardous to leave around as well. Green solution has a larger moisture content, this means it has been oxidised to its Cr3+ state rather then the stab...

Hi All, I have finished Uni for the semester and the year for that matter, I saying this I am glad to be back in the drivers seat hear on chemtalk and will be able to repond to any questions and also post some articles also. Glad to all the familiar people and also the newcomers as well. Talk more l...

Hi Labbie, I can answer this quite easily for you the ferricyanide has oxidesed to ferrouscyanide changing the Iron (II) to Iron (III) (GREEN), this was probably done as the salt solution was used. There is another ingredient which makes the Potassium Ferricyanate stable it doesnt come to mind but I...

Hi All,

Next year (2011) is the International Year of Chemistry. Is your school doing anything Chemistry to celebrate the occasion. I am looking at staging a Chemistry theme for the School for that year. Possibly a Chemistry show for students and parents/caregivers.

Cheers,

Robb.....

Hi All,

Oop's was not intentional, have fixed the problem. Made me laugh too....

Cheers,

Robb.....

Hi All,

CSIS is conforming to the legal requirements hence why we see it there also in CSIS.

Well picked up Labbie....


Cheers,

Robb.....

Hi All, Just to clarify on some of the confusion regarding the spelling of Sulfur.... The American Chemical Society (GOD of all things Chemistry) has rulled in 1983 that the spelling of Sulfur will be SULFUR. Phosphorus is still the same....... But there is ONE EXCEPTION. Aluminium can (in the europ...

Hi Rainbow Sky, and our wonderfull Chemtalk family.

Sodium Bromide is a bit like Hydrochloric Acid. It will turn yellow under prolonged storage under artificail light.

Natural light will speed up this process but the NaBr is still useable.

Cheers,

Robb.....

Hi all,

sorry for the possibility of repeating I did not see the previous posts.

If you are not familiar with this one, try it.... if so disregard this message.

Cheers,

Robb.....

Hi Rosalie, Just a quick one for you, and I will list the reagents required then give you the steps. Methylene blue Sodium Hydroxide (250mL) Glucose Flask Stopper to fit flask. Add 5gms of Sodium Hydroxide to the flask to this add 5grams of glucose. then to this mixture add a small out of Methylene ...

Hi All,

Exams went well, and it's good to be back. I have been busy with other things Scientific at the moment.

I am back at Uni again and still hitting the keyboard and glad to be back on Chemtalk...

Cheers,

Robb.

Hi All,

All I'm going to say is Safety....

Cheers,

Robb.....

Hi All,

Just to reiterate what most people are saying, PVC pipe with end caps with a tube inlet tap to allow for water washing.

Great piece of Equipment.

Cheers,

Robb.....

Hi noona,

Congratulations... and I hope mum and dad have a very wonderful time with their new addition, and not forgetting that tired eyes are only a temporary fact phase.

All the best..

Robb.....

Hi All, Wishing you all and your families the very best for Christmas and a very prosperous and safe new year for 2010. Keep up the good work that you do here on Chemtalk and I am looking forward to some new ideas coming and the family spirit we share here on chemtalk. Job well done this year...... ...