Hi all
We just did a prac. which required acidified potassium permanganate. I made up .01M of KMnO4 and just added a couple of drops of conc. sulfuric acid.Teacher was happy with the result.So there you go!! Would you call it bucket science? If so, it worked a treat!!!
Cheers
Mother
Search found 256 matches
- 14 Nov 2007, 10:24
- Forum: Safety with Chemicals
- Topic: Acidified potassium permanganate
- Replies: 11
- Views: 13232
- 31 Oct 2007, 14:24
- Forum: Biology, Physics...
- Topic: how to remove waterglass marks from glass
- Replies: 4
- Views: 1949
Re: how to remove waterglass marks from glass
Hi All Try a solution of oxalic acid.I always have a bottle made up ready. It can be used over and over again. It is great for rust or brown stains on glasswear(stains disappear right before your eyes!!) and I'm sure it will clean other things as well. For 0.5M use 2.7g in 500mls of distilled water....
- 31 Oct 2007, 14:07
- Forum: Chemistry and Labware - General
- Topic: Junket!!
- Replies: 68
- Views: 33459
Re: Junket!!
I see a few of you are using junket for the enzyme prac. We have just finished this prac. and we used liver(lamb's fry from the supermarket) for all three sections being: Temperature,PH and Substrate.This prac. is a bit messy but if you use large test tubes that can be overcome. However it took long...
- 29 Oct 2007, 13:27
- Forum: Chemistry and Labware - General
- Topic: Distilled Water
- Replies: 9
- Views: 3304
Distilled Water
I make my distilled water from a distiller which uses steam to make the water.I have always known that the water, when tested was slightly acidic.One of the teachers has just told me this also.As if I didn't know!!!! Anyway this leads me to ask all of you if your water is also slightly acidic???? I ...
- 27 Oct 2007, 07:35
- Forum: Chemistry and Labware - General
- Topic: CuSO4
- Replies: 19
- Views: 9138
Re: CuSO4
Hi all I have been very quiet on the chat site so far this term.Although Yr.12 are doing their HSC exams.Yr.11 who are our new Yr.12s are full on with doing pracs. Yr. 10 are also busy preparing for their exams(doing pracs.)Not enough hours in the day!!!! Anyway it is Saturday and I was up at 5.30am...
- 17 Oct 2007, 15:31
- Forum: Sourcing Materials & Eq Repairs
- Topic: beakers
- Replies: 2
- Views: 1570
Re: beakers
Hi Rosalie
What I have done in the past when ordering beakers of specific volume e.g. 500mls.I order the next volume up and order 600ml beakers.This will give you a reading for 500mls.
Hope this helps
Cheers
Mother
What I have done in the past when ordering beakers of specific volume e.g. 500mls.I order the next volume up and order 600ml beakers.This will give you a reading for 500mls.
Hope this helps
Cheers
Mother
- 16 Oct 2007, 14:31
- Forum: Chemistry and Labware - General
- Topic: Thorium Salt
- Replies: 6
- Views: 2572
Re: Thorium Salt
Thanks for that info.guys and gals.Can't find Thorium Nitrate either!!
Cheers
Mother
Cheers
Mother
- 16 Oct 2007, 11:33
- Forum: Chemistry and Labware - General
- Topic: Thorium Salt
- Replies: 6
- Views: 2572
Thorium Salt
Hi All We have a Wilson's Cloud Chamber-expansion type that I have just come across in the storeroom(never been used from the look of it!!) The instructions say to use a weak solution of Thorium Salt but I can't find it in any of the catalogues that I have. Maybe, it being a radioactive solution it ...
- 27 Sep 2007, 14:43
- Forum: Safety with Chemicals
- Topic: 6m Sodium Hydroxide
- Replies: 9
- Views: 3416
Re: 6m Sodium Hydroxide
Good Heavens!!! 6M NaOH for Year 10 soap making!!!! This is way too caustic to make soap.The experiment would be fraught with danger.2M would be good enough.
Cheers
Mother
Cheers
Mother
- 13 Sep 2007, 11:46
- Forum: Chemistry and Labware - General
- Topic: Test Tube Quality
- Replies: 29
- Views: 8314
Re: Test Tube Quality
Hi there Richard and all who posted replies.
The last two days I have been reading your inputs and I have to say,I enjoyed the comments very much,most uplifting. Brian is a very fine specimen!!!!!! Looks like he has attitude!!!!
Thanks
Mother
The last two days I have been reading your inputs and I have to say,I enjoyed the comments very much,most uplifting. Brian is a very fine specimen!!!!!! Looks like he has attitude!!!!
Thanks
Mother
- 04 Sep 2007, 12:33
- Forum: Safety with Chemicals
- Topic: 2007 Chemical Safety in Schools Update Course
- Replies: 40
- Views: 12874
Re: 2007 Chemical Safety in Schools Update Course
Hi Barbara
I was speaking to our Workcover rep. yesterday and she indicated that the new or updated CSIS will be released to the public schools probably in Term 4. Although, might I suggest, Don't hold your breath!!!
Cheers
mother
I was speaking to our Workcover rep. yesterday and she indicated that the new or updated CSIS will be released to the public schools probably in Term 4. Although, might I suggest, Don't hold your breath!!!
Cheers
mother
- 31 Aug 2007, 15:16
- Forum: Safety with Chemicals
- Topic: risk assessment
- Replies: 145
- Views: 41834
Re: risk assessment
Hi Robb
I thought I sent you a post requesting a copy of the RA sheets, seems it buried itself somewhere If you could fax the info. to me I would be most grateful.
FAX NO. 6882 4332
Ta
Mother
I thought I sent you a post requesting a copy of the RA sheets, seems it buried itself somewhere If you could fax the info. to me I would be most grateful.
FAX NO. 6882 4332
Ta
Mother
- 29 Aug 2007, 15:02
- Forum: Safety with Chemicals
- Topic: 2007 Chemical Safety in Schools Update Course
- Replies: 40
- Views: 12874
Re: 2007 Chemical Safety in Schools Update Course
Hi there Lada Many,many thanks for the offer of accommodation,very nice of you =D> =D> A lab tech.from one of the other schools here is thinking of going to the course,so we will probably go together(if our schools allow us to go!!) and share a room somewhere close to the venue. If someone has any i...
- 29 Aug 2007, 10:47
- Forum: Safety with Chemicals
- Topic: 2007 Chemical Safety in Schools Update Course
- Replies: 40
- Views: 12874
Re: 2007 Chemical Safety in Schools Update Course
You guys in the metropolitan areas are just so lucky to have close access to these courses.We, in the bush on the other hand are disavantaged by distance and having to pay for accommodation.Most schools in regional areas baulk at the expense of sending anyone to courses outside their own areas.Even ...
- 28 Aug 2007, 12:36
- Forum: Chemistry and Labware - General
- Topic: Molarity of Copper Sulfate for Electrolysis
- Replies: 5
- Views: 2172
Re: Molarity of Copper Sulfate for Electrolysis
Hi there Lorrae
Beautiful day in Dubbo,expected temp.is 26 but is 19 in my lab.
You can use .5M but I suggest 1M as the reaction is quicker
Cheers
Mother
Beautiful day in Dubbo,expected temp.is 26 but is 19 in my lab.
You can use .5M but I suggest 1M as the reaction is quicker
Cheers
Mother
- 28 Aug 2007, 09:49
- Forum: Safety with Chemicals
- Topic: risk assessment
- Replies: 145
- Views: 41834
Re: risk assessment
Hi Robb
Would very much appreciate a copy of your risk assessment also.
Fax No: 68824322.Attention Lee
Ta
Mother
Would very much appreciate a copy of your risk assessment also.
Fax No: 68824322.Attention Lee
Ta
Mother
- 23 Aug 2007, 11:23
- Forum: Sourcing Materials & Eq Repairs
- Topic: tin nitrate
- Replies: 5
- Views: 2438
Re: tin nitrate
Hi Rosalie
If you could tell us what you are using the tin nitrate for, we may be able to recommend a substitute.
Cheers
Mother
If you could tell us what you are using the tin nitrate for, we may be able to recommend a substitute.
Cheers
Mother
- 23 Aug 2007, 11:07
- Forum: Announcements
- Topic: junket
- Replies: 6
- Views: 3524
Re: junket
I bought junket powder from the health food store here in Dubbo.
Mother
Mother
- 23 Aug 2007, 11:03
- Forum: Announcements
- Topic: St Marys Conference
- Replies: 10
- Views: 4536
Re: St Marys Conference
Dubbo College/Senior Campus has not received any info yet.
Hope they have'nt forgotten us!!!
Cheers
Mother
Hope they have'nt forgotten us!!!
Cheers
Mother
- 21 Aug 2007, 11:32
- Forum: Chemistry and Labware - General
- Topic: Nasty tasting, anti-fingernail biting stuff
- Replies: 10
- Views: 4166
Re: Nasty tasting, anti-fingernail biting stuff
Hi All We have 14 classes of Year10's and do the Natural Selection Prac.with all of them.Lots and lots of jellybeans!!! So what I do,is paint a different colour jelly bean for each class, as word soon gets around if the same colour jelly bean is painted all the time. Another thing to remember is not...