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Illegal/Dangerous Activities: Explicit "how to" discussions of illegal and/or dangerous activities, or posts...
Jul31-07 05:03 PM
chemisttree
0 36,489
chemical, latex, typeset Sticky Thread Pinned: Chemical LaTeX typeset ( 1 2 3 ... Last)
Physicsforums now has a very cool feature, which enables complex typesetting for formulas or equations! A tutorial...
Jul7-13 04:53 PM
jackmell
64 137,072
chemistry, websites Sticky Thread Pinned: Good chemistry websites ( 1 2 3 ... Last)
I think that these links can be interesting: PeriodicTable: http://www.webelements.com/...
Apr18-14 03:49 PM
djh101
114 126,779
Hello I am currently enrolled in General Chem. We are learning how to write chemical formulas. Can someone please...
Jan19-07 09:58 PM
rooparul
17 3,733
Is a pipette used to transport the aqeous reactant to the flask. Is a burette used to transport the titrant in the...
Jan21-07 06:58 PM
GCT
2 1,938
What is the point of using the redox convention in describing reactions involving covalently bonded species? To me it...
Jan21-07 07:05 PM
GCT
4 2,573
From what I gather both ionic and covalent bonds transform all the elements involved into ions. Does that mean every...
Jan21-07 07:29 PM
GCT
3 4,031
Salts such as Na2SO4 are generally regarded as salting out (at least in colloid chemistry I think). What is the...
Jan22-07 06:45 AM
thearny
0 2,917
In medicinal chemistry fluorine atoms are often used on scaffolds in order to increase metabolic stability of a...
Jan22-07 07:17 PM
gravenewworld
6 5,243
When you burn pure sulphur, what is the solid residue left behind? I Know that sulphur dioxide is the gas that is...
Jan23-07 06:57 AM
JGM_14
5 3,402
The textbook said if you add dry ice (carbon dioxide) to lemonade or soda water, the pH of the substance (which is...
Jan23-07 05:19 PM
Gokul43201
17 5,908
My teacher mentioned that if an element has a neutron to proton ratio of 1.2 or higher than the element is...
Jan23-07 06:34 PM
dionysian
3 8,505
I have read on the faq section of the google physics group that sometimes ice re-freezes faster after hotter water is...
Jan24-07 02:53 PM
verdigris
2 1,971
We did an experiment in chemistry class today, where we had to see whether certain substances dissolved in water...
Jan24-07 04:50 PM
Gokul43201
10 30,084
I put a copper pipe in a tank of water with dissolved iron in it and applied an electric current somthing like 6 volts...
Jan25-07 10:11 AM
chemisttree
14 4,126
Sulphate ions and nitric acid wouldn’t react? Is it because sulfuric acid is a very strong acid, while nitric acids...
Jan26-07 02:42 PM
Borek
1 1,755
One time I made an oil that burned cooler than normal (or so I think) and has a persistant flame (in light wind it...
Jan26-07 03:00 PM
chemisttree
2 1,491
In my textbook, it had 2Cu2+(aq) + 4I-(aq) -> CuI(s) + I2(aq) How does that work? First of all it's not...
Jan27-07 06:10 AM
pivoxa15
4 1,919
Then you make black powder with KNO3 + S + C and if your ratios are abit messed up. Can somebody please answer these...
Jan30-07 04:45 PM
chemisttree
1 1,440
Hi all, i am hoping to make sodium bisulphite by passing so2 through NaOH. However, i was wondering if anyone...
Jan30-07 05:40 PM
chemisttree
1 3,737
I don't know how to answer this question. I have to find the number of moles of water in the hydrate BaCL2*H2O. SOwwie...
Jan30-07 06:15 PM
chris2009
3 1,790
I was wondering why hydrogen bonding only occurs in molecules containing H and one or more of the following: N, O, and...
Jan31-07 06:05 PM
CaptainZappo
2 5,406
Hi all, I have a small question. I have checked it:...
Feb1-07 01:43 PM
de Ran-Guilbert
2 834
Why is the equilibrium constant, k defined the way it is? There are other expressions that would also be constant...
Feb2-07 07:19 AM
Gokul43201
1 2,175
Hey people, I have beeno wondering this for a while: If the nucleus of an atom is positively charged and the...
Feb3-07 12:03 PM
Gokul43201
2 1,308
Im reading about covalent bonds and I read that Molecular or true formula can fully identify ionic bonding compouds...
Feb4-07 12:52 PM
Gokul43201
1 1,985
Ok i was in chemistry the other day and we were talking about combustion of alkanes in both complete and non complete...
Feb6-07 04:41 AM
Wellsi
2 1,075
Why is fire hotter when fueled by sulfur as compared to say, paper, wood, or charcoal?
Feb6-07 05:42 AM
Jacquesl
12 2,078
My chemistry textbook states the following: "In general, larger molecules tend to have greater polarizabilities...
Feb6-07 03:57 PM
CaptainZappo
2 15,235
Someone likened cooking with titration. How accurate is this? Is heat usually applied to titration? Does titration...
Feb7-07 02:43 AM
pivoxa15
6 2,160
Not everybody has access to Sodium hydroxide lye and not everyone can afford brewing barrels and all the other ****...
Feb7-07 09:31 AM
chemisttree
5 4,834
Hi How is it possible to tell if fuel (gas) is contaminated (by water / alcohols / oils etc)? Roger
Feb7-07 11:14 AM
chemisttree
9 6,887
Hi, In all derivations of the Eyring equation I've seen, all the steps are carried out in detail until the end,...
Feb7-07 12:55 PM
loom91
5 8,020
What is the full form of TCC found in Dettol soaps?
Feb7-07 03:07 PM
chemisttree
3 1,522
What happens to lead then you overheat it beyond its melting point, and what metal or chemical does it become then?
Feb8-07 10:26 AM
Jacquesl
31 5,878
If chlorophyll makes leaves green, and carotenoid makes them yellow, orange, and brown, then what in the world makes...
Feb8-07 03:12 PM
dmoravec
3 2,027
Cu(NH_3)_4(OH)_2 Ag(NH_3)_2Cl I tried to research on wikipedia but found none... Any help would be greatly...
Feb12-07 12:12 PM
chemisttree
1 1,453
In a battery cell, let iodine (I2) be the oxidant. In this half cell, what could the electrode be? Could it have an...
Feb12-07 04:07 PM
chemisttree
1 4,050
Them do I know then something is a combustible or not? Water : H20 = Fire killer, normal phase, liquid Propane :...
Feb12-07 05:10 PM
Moonbear
12 1,311
I was thinking about make some HCl. My idea was to electrolys a NaCl solution and get a solution of H2 and Cl2. Then...
Feb13-07 10:40 AM
mrjeffy321
7 15,021
During qualitative analysis of Barium, Strontium, Calcium, why do we use NH4CO3, NH4OH, NH4Cl. Even if we were to...
Feb13-07 11:30 AM
chemisttree
1 7,005
Yes, as the title suggests I need to neutralize some H2S so that I can safely enter some confined spaces. I was hoping...
Feb13-07 08:26 PM
Moonbear
6 10,101
Hi, I just have a question about some practical things in a chemistry lab and errors. :uhh: We carried out a...
Feb14-07 02:35 PM
FaNgS
5 2,517

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