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Messages 12939 - 12971 of 13929   Oldest  |  < Older  |  Newer >  |  Newest
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12939
Hello, all. Just joined this group and am looking forward to reading the discussions and taking part in many. For more on me, as well as my work in Chemistry,...
Jeffrey N Cook
antidyne
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Apr 1, 2008
2:01 pm
12942
Hi all chemists in this mail i want to introduce you the best site for free ebooks and magazine so enjoy from it. http://www.ebookee.com/ Viva Forever Omid...
a
carbon_od12
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Apr 3, 2008
7:54 am
12943
hi guyz, Need help abt the basic concept of thermodynamics. State of a system;described by the teacher is the physical state of the system(whether the system...
Buddy Love
thesweetglad...
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Apr 4, 2008
3:16 pm
12945
How can determine sodium in water without instrumemts when you know the other cations and anions like from balance? are there test kits for sodium analysis?...
moh_ahmedz
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Apr 4, 2008
6:04 pm
12946
You can use a tire loop washed win hydrochloridric acid and expose loop soaked with solution to the oxidative zone in the Bunsen burner, if a shine orange...
Jair Antônio da Rosa
jairrosa
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Apr 4, 2008
7:34 pm
12947
That would be a qualitative test. The best quantitative test is flame photometry, which depends on the intense yellow-orange twin emission lines, at about 5890...
John W
johnwwxtraconz
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Apr 4, 2008
7:51 pm
12948
Hi Can Any plz tell me how to deprotect TIPS attached to acetylene, I used the Tetra butyl ammonium floride but it did not work Plz Guide me Thanks Sonali ...
Sonali K
sonalikgt
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Apr 5, 2008
6:34 am
12949
I mean how I can know approximately the concentration of sodium with simple calculation if I have analysis for other basic ions like Cl , HCO3 , etc. John W...
mohamed ahmed
moh_ahmedz
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Apr 5, 2008
12:25 pm
12950
Hello i just want to know what does free radical such as chlorine atom,formed as a result of homolytic fission of Cl2 do to the C-H bond of the methane in...
Buddy Love
thesweetglad...
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Apr 5, 2008
12:25 pm
12951
I search any acid Ican use instead of sulfuric and HCl in decreasing PH in cooling tower water treatment and if we can usecitric acid in this application....
moh_ahmedz
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Apr 5, 2008
12:36 pm
12952
Hi Can Any plz tell me how to deprotect TIPS attached to acetylene, I used the Tetra butyl ammonium floride but it did not work Plz Guide me. DOes any one has...
Sonali K
sonalikgt
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Apr 5, 2008
3:53 pm
12953
The problems with organic carboxylic acids such as citric acid are that (a) they are nearly all MUCH weaker than mineral acids like H2SO4 and HCl, and (b) many...
John W
johnwwxtraconz
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Apr 5, 2008
11:04 pm
12954
For that, if you know the concentrations of all anions present, including Cl-, HCO3-, etc., AND if you assume that the only cation present in appreciable...
John W
johnwwxtraconz
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Apr 6, 2008
12:40 am
12955
I have recently uploaded to rapidshare.com my comprehensive collection of ebooks and articles on free-radical chemistry, mostly concerning organic chemistry. I...
John W
johnwwxtraconz
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Apr 6, 2008
2:13 am
12956
why didn't you use flame fotometri? flame fotometri is suitable to determine of sodium. ... From: moh_ahmedz <moh_ahmedz@...> To:...
Chandra Koboy
co_boymen
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Apr 7, 2008
2:15 am
12957
measure about 100 ml of the water and pour into a 250ml PTFE beaker. Add 5ml of nitric acid(Analar)and place the beaker onto a hot plate. heat to almost ...
Collins Tembo
collinstmb
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Apr 7, 2008
2:21 pm
12958
measure about 100 ml of the water and pour into a 250ml PTFE beaker. Add 5ml of nitric acid(Analar)and place the beaker onto a hot plate. heat to almost ...
Collins Tembo
collinstmb
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Apr 7, 2008
2:30 pm
12959
الأخ الفاضل شاكرين مقدماً علي حسن التعاون برجاء إرسال طريقة بسيطة وسهلة ميدانياُ أو...
mzakzouk62
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Apr 7, 2008
3:45 pm
12960
i am chris, recently i received a sample from customer regarding test for the concentration of the molybdate in a sodium molybdate sample. However, this sample...
metalgear852002
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Apr 8, 2008
2:47 pm
12961
Palintest offers a variety of meters and testing supplies for just such analysis. Try this website www.palintest.com/parameters/molybdate This site lists all...
Bryan
bluedevils_24
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Apr 8, 2008
8:42 pm
12962
did you have other equipment? or can you tell abot your procedure, maybe we can know your problem from prepare sample. ... From: metalgear852002...
Chandra Koboy
co_boymen
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Apr 9, 2008
1:25 am
12963
did you have other equipment? or can you tell abot your procedure, maybe we can know your problem from prepare sample. ... From: metalgear852002...
Chandra Koboy
co_boymen
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Apr 9, 2008
1:26 am
12964
hi i need the dowmload link of these books if u can give them to me i will be very thanksed books: 1)principles of polymer systems 2)polymer scciense and...
sunrise_s_2020
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Apr 9, 2008
10:46 am
12965
Jhon, thanks for your reply,im most obliged to you for sharing your book with me but the thing is i cant pay 1500 Rs for just one reaction mechanism,im only...
Buddy Love
thesweetglad...
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Apr 9, 2008
5:19 pm
12966
A few days ago, I uploaded and gave on thkis group and elsewhere the downloading links for an 180 Mb collection of ebooks and articles on free-radial ...
John W
johnwwxtraconz
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Apr 9, 2008
6:22 pm
12967
The method is hach spectrophotometer + reagent(molyver 1+2+3),first prepared a sample, then pour 10ml of the sample into a sample cell, then pour in molyver 1...
chris chuen
metalgear852002
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Apr 9, 2008
10:41 pm
12968
The method is hach spectrophotometer + reagent(molyver 1+2+3),first prepared a sample, then pour 10ml of the sample into a sample cell, then pour in molyver 1...
chris chuen
metalgear852002
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Apr 9, 2008
11:35 pm
12969
I try to heat the sodium molybdate until it get dry, then i get the weight in grams(sodium molybdate)and convert it to ppm....is this way works since the water...
metalgear852002
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Apr 10, 2008
5:32 am
12970
I think your problem not only contamination, Imposible contamination has value twice exact value, then I only sugested you do several testing (ex. 6 X) then...
Chandra Koboy
co_boymen
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Apr 10, 2008
9:36 am
12971
hi i need some information about "beckman termometer" how it works or any thing about it if u can give some info i will be very thanksed thanks very much pooya...
sunrise_s_2020
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Apr 10, 2008
10:48 am
Messages 12939 - 12971 of 13929   Oldest  |  < Older  |  Newer >  |  Newest
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