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Jan16-12 Greg Bernhardt
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
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chemistry, websites Sticky Thread Pinned: Good chemistry websites ( 1 2 3 ... Last)
I think that these links can be interesting: PeriodicTable:
Aug20-14 04:40 PM
Andrew Tsvyk
116 151,524
Illegal/Dangerous Activities: Explicit "how to" discussions of illegal and/or dangerous activities, or posts...
Jul31-07 05:03 PM
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I did an experiment in my Chem II class that required finding the equilibrium constant for this reaction Fe3+ +...
Mar16-08 11:29 PM
1 2,731
Hi everyone! So, something sort of weird happened in analytical lab and I was wanting some guidance. I was trying to...
Dec4-12 10:55 PM
14 3,070
If a 2.893 g sample of an unknown containing iron requires 28.45 mL of the permanganate solution described in...
Apr1-09 03:21 PM
4 10,272
Hi just wondering if you could help, Ive stumbled across an example question where the iron purity is meant to be...
Nov13-10 05:55 PM
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Hi all, I was given an unknown in a recent lab and determined it was lactose. However, I'm not quite sure why it...
May25-11 08:33 PM
0 1,927
hi everyone, im trying to find the atomic radius of an Al atom using a few measurements i have. i had a piece of...
Jan20-05 04:16 AM
3 5,940
Okay, I'm working on some pchem problems and I'm stuck on this one question... A 5.33g piece of Cu metal is heated...
Dec8-04 10:16 PM
2 9,782
Dear Fellow Members, If we have been given an unknown compound.We even don't know that it...
Jan19-14 08:56 AM
3 548
On my test the professor gave us the rate, parameters of A, and temperature of 298K. We were asked to find the...
Nov25-11 01:03 PM
2 2,206
Hello everybody, I want to determine the extinction coefficients of Fe2+ and Fe3+ in glass. There are literature...
Sep6-13 03:26 AM
13 1,347
How would I determine, if given a chemical equation is exothermic or endothermic? Eg. Mg + 2HCL\rightarrowMgCl2 + H2
Feb23-13 10:24 AM
2 1,880
Hey , I still do not understand how to determine the activation energy for the reverse reaction when you are given...
May10-05 11:58 AM
1 956
So, I've extracted a small amount of (hopefully) caffeine from coffee via solvent extraction with hexane. Quick note...
Jun30-11 12:17 AM
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This is a topic that I simply know very little about. The question is asking me to determine the pKa value from the...
Sep15-07 12:09 AM
2 2,064
How does one use various liquids and their unique densities to determine the pressure of a gas in a manometer?
Jan21-05 02:33 PM
4 1,505
Hi guys, I am doing a lab experiment which involves analysis of a sample of a mixture of NaCl and KCl. I'm using...
Oct17-12 05:13 PM
5 1,626
How can you tell NH3 is a better base than HOCOO-? I look at the conjugate species in both to determine their...
Sep14-14 12:54 PM
3 284
I know how to do it one way, which is write down the chemical formula, balance it, and from the molarity of the...
Feb17-09 06:14 AM
2 4,477
the problem im working with is: Naphthalene is a carbon-hydrogen compound that finds use as mothballs. A sample of...
Jun9-12 02:26 AM
6 2,003
If I know the percentage by weight of elements in a formula I can calculate the relative ratios of atoms in the...
Aug7-11 09:47 AM
1 2,543
I know its a rather simple question but if you think about it, it requires much knowledge of d orbital. Is there an...
Apr15-08 02:40 AM
1 42,232
Does there exist a fool-proof way of doing it? I've scoured the forums, and I've already found this question, but...
Jan24-14 03:31 PM
3 510
if one were to electrictally produce Cl from salt solution how would you tell when all the salt was electroliticaly...
Jul27-07 02:12 PM
19 4,525
This question may sound a bit odd, but is there a relatively simple way(by simple, I mean inexpensive) to determine...
Jul6-12 07:35 PM
2 1,307
Hi I need to compare solid working with \frac{1}{2}O_{2}+H_{2}O+2e^{-} \rightarrow 2OH^{-} and...
Dec19-12 04:28 PM
0 878
Hi, I've recently made some very budget homemade 'beer', butt i'm wondering is there an easy (doesn't have to be...
Jan15-14 04:12 PM
16 1,014
Is there any way to predict how two chemicals will react or is it up to experimentation to discover that? Take salt...
Jul18-09 06:06 PM
3 4,257
I want to determine whether a solvent layer has water or not. (have: solvent layer + unknown compound(s) dissolved in...
Apr30-09 03:39 PM
10 2,712
How can you determine the ratio of the keto tautomer of a compound to its enol form? I know which functional groups...
Oct30-10 05:19 PM
4 3,732
What is the molecular formula of a compound which contains 92.3% carbon and 7.7% hydrogen by mass, if 0.39g of its...
Nov15-04 02:26 AM
4 6,291
I have some field chambers buried in the soil at work here and we collect soil emissions from them at regular...
Feb15-11 09:00 AM
0 1,877
Hi everyone, I need to evaluate parameters (heat capacity, density and thermal conductivity) for some very humid...
Jun30-10 01:14 PM
1 1,182
I need to create a procedure for doing what the title says. I have researched online, but have not found any way (I...
Feb12-10 03:16 PM
6 2,610
I am in search of a way of determining the colurs of transition metal. Is there any way to find their colours without...
May22-04 03:11 AM
1 1,472
What is the equivalent weight of ozone molecule? I mean how can I find out the equivalent weight of molecules? Is...
May25-13 06:25 AM
6 1,142
I am trying to figure out how you can get the formula of a compound when you are given mass spec data. The mass...
May3-10 02:35 PM
1 1,758
Lets say I need to predict the number of infrared absorbance peaks that will appear on the IR spectrum of a given...
Jan3-12 04:45 PM
0 2,391
Heres the question: Firstly does anyone know what Ki is? Ionisation...
Jul27-12 01:18 PM
1 681
In reverse osmosis of salt water, the mesh size in filter determines the size of particles dissolved in the solution...
Oct12-12 09:02 AM
2 1,009
Hello, This is a matter I have been having some difficulties with for the past few days. My question: How is it...
Oct14-11 03:08 AM
1 2,185

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