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PhysicsForums Lab Experiment for Preparation of Ammonia  
10:52 19-Jul-07   [Replies: 10, Views: 369]    By: Unnamed
Hello , We tried to demonstrate preparation of Ammonia by mixing Ammonium Chloride and Calcium Hydroxide in round bottom flask mixed in the proportion of 2:3 . The flask was in a slanting position ...
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PhysicsForums half- rxns  
17:39 18-Jul-07   [Replies: 0, Views: 41]    By: Unnamed
Hello everybody, I'm told that potassium permanganate is dissolved in an aqueous buffer of ammonia and ammonium at equal concentrations (1M), and treated with 1M sodium hypochlorite, the permanganate...
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PhysicsForums Maxwell-Boltzmann Distribution Calculations  
16:23 18-Jul-07   [Replies: 0, Views: 168]    By: Unnamed
Dear Physics Forums members, The Maxwell-Boltzmann Distribution curves (obtained by calculation) allow one to statistically calculate the distribution of energies of molecules among a solution or m...
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PhysicsForums Electrolysis  
23:37 17-Jul-07   [Replies: 19, Views: 566]    By: Unnamed
if one were to electrictally produce Cl from salt solution how would you tell when all the salt was electroliticaly converted to NaOH and Cl2?...
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PhysicsForums Gas Solubility  
23:22 16-Jul-07   [Replies: 0, Views: 4]    By: Unnamed
I am so lost as to how I should approach this problem A soft drink is made by dissolving CO2 @ 3.00 atm in a flavored solution and sealing the solution in an aluminum can @ 20C. What volume of CO2...
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PhysicsForums High school chem project [preferably on toxicology]  
03:33 16-Jul-07   [Replies: 0, Views: 149]    By: Unnamed
hi all.. this is rohan here. It's time for the high school chem project, and i want to do a project on toxicology, though if i get a better idea in any other subject [related to chem], i'd do that too...
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PhysicsForums Deet  
00:50 14-Jul-07   [Replies: 1, Views: 135]    By: Unnamed
is Diethyltoluamide present in plant material?...
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PhysicsForums Elderberry coloring oil  
00:48 14-Jul-07   [Replies: 1, Views: 148]    By: Unnamed
I found that the leaves of the elderberry tree (Sambucus nigra) can be used to add a green coloring to oils and fats, among other things, is this claim true? http://www.pfaf.org/database/plants.php?S...
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PhysicsForums Chemical detection by irrediation?  
11:47 12-Jul-07   [Replies: 3, Views: 151]    By: Unnamed
Some complex/man made molecules decompose so as to leave detectable components. The detection of these components may be accomplished by QA or a good nose. However, is it possible to irradiate the sus...
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PhysicsForums NH4 from NaOH and MnO2 ????  
01:01 12-Jul-07   [Replies: 8, Views: 260]    By: Unnamed
Mostly following an episode of csi, i found that you can make potassium permanganate from KOH and Manganese dioxide. I wanted to try this but i didnt have access to KOH so i decided to use sodium hydr...
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PhysicsForums Caffeine from coffee  
22:04 10-Jul-07   [Replies: 16, Views: 315]    By: Unnamed
I found this on the internet and was wondering if there was an easier way to extract the caffeine from coffee because this takes more time and equipment than i care to use is there any way i could do ...
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PhysicsForums Solvent washing  
15:09 8-Jul-07   [Replies: 13, Views: 530]    By: Unnamed
I was reading about washing non polar soluble chemicals with a polar solvent like water. How exactly is that done? If you add water to the non polar solvent containing the chemical to wash away all th...
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PhysicsForums Boiling solvents  
03:23 8-Jul-07   [Replies: 11, Views: 329]    By: Unnamed
I'm planning on studying chemistry in university next year and although I know a good bit of inorganic and organic chem theory I have very little practical lab experience. I want to get a feel for ...
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PhysicsForums Copper Impregnated anodes  
11:56 7-Jul-07   [Replies: 7, Views: 206]    By: Unnamed
i just recently acquired a few pieces of copper impregnated graphite. this stuff is supposed to have high wear resistance in EDM applications So i thought i would give it a shot in a chlorate cell. Af...
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PhysicsForums Methods of measuring concentrations of lead  
20:06 5-Jul-07   [Replies: 0, Views: 18]    By: Unnamed
Hi, I will be investigating the concentration of lead in Henna, a traditional moroccan substance we apply to our hands, for my extended essay. In order to do so, I have to derive method(s) by which ...
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PhysicsForums Isolation of a Pure Substance  
20:11 4-Jul-07   [Replies: 2, Views: 192]    By: Unnamed
In the crystallization process after gravity filtration is carried out, a mixture of ice and water is sometimes used as a bath instead of just ice. I know that the ice/water bath can be used to cool t...
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PhysicsForums Oxidation and Reduction  
20:41 3-Jul-07   [Replies: 1, Views: 146]    By: Unnamed
I do not understand how to balance these oxidation reduction equations. These equations seem really complicated, I don't understand them. The question that i have to answer is Balance the followin...
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PhysicsForums Organic Chemistry help  
20:30 3-Jul-07   [Replies: 1, Views: 179]    By: Unnamed
I came across this question and I don't understand how to approach it. Write balanced equations to show the formation of each of the following compounds. Name the reactants in each case and show cle...
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PhysicsForums NH3 and Transiton complexes  
20:25 3-Jul-07   [Replies: 1, Views: 159]    By: Unnamed
I am taking this correspondence course, i ran into this question and I think i know the answer but i'm not sure. Why is it that NH3 readily forms complex ions with the transition elements but NH4 doe...
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PhysicsForums Burning Hydrocarbons with by products  
11:46 3-Jul-07   [Replies: 4, Views: 196]    By: Unnamed
Would it ever be possible to make a synthetic hydrocarbon that wouldn't produce harmful by products....
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PhysicsForums Moles and atomic weights  
00:07 3-Jul-07   [Replies: 5, Views: 397]    By: Unnamed
I can't understand how both the atomic weight of one atom of an element and the weight in grams of a mole of that element are the exact same thing. For example helium has an atomic mass of 4.0026. ...
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PhysicsForums Isolating chemicals  
16:23 2-Jul-07   [Replies: 2, Views: 228]    By: Unnamed
I want to learn how to isolate chemicals from substances. For example lets say I have a pile of powder which consists of about 5 different chemicals. The chemical I want to isolate is highly solubl...
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PhysicsForums IR/Raman spectra and symmetry  
13:37 2-Jul-07   [Replies: 2, Views: 143]    By: Unnamed
hi, I am trying to interpret some data which have been calculated for IR/Raman but I don't know how to interpret them exactly. The schema says mode \nu 1 b_u 82 1 a_g 216 2 b_g 239 I...
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PhysicsForums Aluminum Chloride Solution  
05:15 2-Jul-07   [Replies: 1, Views: 163]    By: Unnamed
Does anyone know a good method of producing Aluminum Chloride in liquid form? I need to prepare a 25% Aluminum Chloride Solution for my presentation. Any help would be greatly appreciated....
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PhysicsForums Acetone volatility  
01:44 2-Jul-07   [Replies: 4, Views: 187]    By: Unnamed
When you pour some acetone on the ground and it evaporates does it leave any residue at all or does it vanish without a trace? I love working with acetone because whenever I spill it on my hands I...
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