barium sulfate prac for yr12
barium sulfate prac for yr12
We have finally done this prac and got good results finally for the first time. They used agar as a coagulating agent, and it worked a treat. Everyone else may already have this info, but just in case you are still scratching your head, there is a way to make it work. Cheers
- fibreweb
- Posts: 620
- Joined: 20 Jul 2006, 10:00
- School: Oxley High School
- Suburb: Tamworth
- State/Location: NSW
Re: barium sulfate prac for yr12
But how did they do it?
I spent last thursday afternoon trying out different methods and achieved a good deal of success with a buchner funnel and several layers of our special filter paper, a water powered venturi pump and most of all patience as I only put about a ml at a time through the filter paper.
Also the recipe that used HCl and Baruim Chloride and booiling the mixture worked a lot better then just adding Barium Nitrate to the disolved fertiliser.
I would love instruction on how you used agar as a coagulating agent.
Thanks
Wendy
I spent last thursday afternoon trying out different methods and achieved a good deal of success with a buchner funnel and several layers of our special filter paper, a water powered venturi pump and most of all patience as I only put about a ml at a time through the filter paper.
Also the recipe that used HCl and Baruim Chloride and booiling the mixture worked a lot better then just adding Barium Nitrate to the disolved fertiliser.
I would love instruction on how you used agar as a coagulating agent.
Thanks
Wendy
-
- Posts: 13
- Joined: 23 May 2008, 11:57
- State/Location: VIC
Re: barium sulfate prac for yr12
The trick to filtering barium sulphate is to use a glass filter crucibe (sinter) No.4, this is specially designed to filter the ultra fine BaSO4. Any vacuum will do, but it is a much quicker job if you have access to an electric pump.
Regards
Jenny Walter
Regards
Jenny Walter
Re: barium sulfate prac for yr12
Hi Wendy
The procedure they used came directly from Chemistry Contexts 2 Second edition Lab Manual Chapter 3. It is about 5 pages in all, but the main stuff is on one page which I can fax if you'd like. If I can find out how to scan stuff I could put it on here as an attachment. I tried to send you a PM this morning on this, but it went off into the ether somewhere! So I put it on as a topic instead, in case others wanted it as well. It doesn't need sintered glass crucibles (which I couldn't buy in the past) either.
The procedure they used came directly from Chemistry Contexts 2 Second edition Lab Manual Chapter 3. It is about 5 pages in all, but the main stuff is on one page which I can fax if you'd like. If I can find out how to scan stuff I could put it on here as an attachment. I tried to send you a PM this morning on this, but it went off into the ether somewhere! So I put it on as a topic instead, in case others wanted it as well. It doesn't need sintered glass crucibles (which I couldn't buy in the past) either.
Re: barium sulfate prac for yr12
Just saw the scanning gurus so will attach the instructions. Ooops I think it will go through as 4 files. Page 2 is the main one.
You do not have the required permissions to view the files attached to this post.
Re: barium sulfate prac for yr12
These attachments look weird on my computer and don't download. It is the same for everyonelse? If so I will try and fix it.
- Labbie
- Posts: 3243
- Joined: 28 Nov 2006, 10:00
- Job Title: Retired
- Suburb: At Home
- State/Location: NSW
Re: barium sulfate prac for yr12
Yes I can not open them at all. On another computer, they are so strange.
Regards Labbie
Lab Manager/Lab Tech, mind reading etc etc
Now retired
Lab Manager/Lab Tech, mind reading etc etc
Now retired
- Ocean Breeze
- Posts: 798
- Joined: 01 Jun 2006, 10:00
- Job Title: Lab Manager
- State/Location: NSW
Re: barium sulfate prac for yr12
same for me, I cant open them either .
- noona
- Posts: 900
- Joined: 11 May 2007, 10:00
- Job Title: Lab Tech
- School: Greystanes High School
- Suburb: Greystanes
- State/Location: NSW
Re: barium sulfate prac for yr12
Me either
the last time I opened something strange I caused all sorts of problems to the emails of 5000 people
the last time I opened something strange I caused all sorts of problems to the emails of 5000 people
Re: barium sulfate prac for yr12
Sorry guys, been flatstrap for a few days. Will go now and try to find someone to help me fix this. Don't hold your breath, but I will be working on it.
Re: barium sulfate prac for yr12
Here goes for another try.
You do not have the required permissions to view the files attached to this post.
- Labbie
- Posts: 3243
- Joined: 28 Nov 2006, 10:00
- Job Title: Retired
- Suburb: At Home
- State/Location: NSW
Re: barium sulfate prac for yr12
Thank you that is great now. Well done.
Regards Labbie
Lab Manager/Lab Tech, mind reading etc etc
Now retired
Lab Manager/Lab Tech, mind reading etc etc
Now retired