Applied Chemistry

I have read a post somewhere that said that iodine can be extracted from seaweed. How much iodine is present in seaweed and what kinds of seaweed has the highest yield? Living in southern california there is plenty of Kelp and sea grass off the coast and i am very interested in the potential for iodine extraction from these plants. If anybody has any info and even a procedure for the extraction i would greatly appreciate it. ps. if there is another source of cheap iodine that anyone knows of please share. thanks.

In order to determine the quantity of Ca and Mg ions in a water sample, it requires a titration with EDTA solution. The procedure also asks that the pH of the reaction be kept at a basic range of 8-10 as all reactions between metal ions and EDTA are pH dependent, and for divalent ions, solutions must be kept basic (and buffered) for the reaction to go to completion. My question is: If the buffer was omitted, would the quantity of EDTA required br higher or lower that if the buffer was added?

This may sound like a stupid question but why do we have water in air at ambient temperatures if the boiling point of water is 100Deg C? I would also like to know the chemistry behind freezing and melting. Why different elements have different boiling and melting points?

I Have 10 Test Tubes Full Of Hydrogen. I Want To Put All Those Test Tubes Of Hydrogen Into A 350mm Flask. How Would I Do This And I Want It Pure As possible?

A few more months here and I'll be finishing up my program. Over the past while I've developed an interest in chromatography. I'm curious to know if anyone has any experience in the chemical industry and can offer some advice. If there is a lot of work, if its worth it to pursue chrom in the long run, in general what people are thinking. I would eventually like to work in the petrochemical industry (I live in Alberta which pays well at the moment).

New here and just looking for a helping hand. At my job I have been charged with testing the effects of chimney caps on gas fired appliances. Simple stuff for most here I'm guessing. Anyway, question is. Can anyone explain what an air-free sample is and if I am taking one and don't know it? I'm using a California analytical dual gas analyzer, measuring CO2 and CO. The CO limit for combustion is .04% in an air-free sample, according to ANSI standards. If this question is not applicable here, can someone please point me in the right direction. No one at work has a clue as to how any of this works. So far I have set up the machine and am able to procure smaples, but …

Apparently this guy has found a way use plain water as an excellent fuel source for all applications. Can anyone explain the chemistry behind this process? http://www.ebaumsworld.com/2006/06/waterfuel.html

helpppppppp! whats the strongest and most dangerous chemical, both organic and inorganic? some says its hydrogen sulphide.is it true? if so y that chemical is that strong to affect the body?

Why do certain particles/ crystals, e.g. sugar, encourage the creation of bubbles in beers and stouts when dissolving? I have noticed that when sugar was dropped into stout/ beer, it creates a surge of bubbles (released from gas in beer) to the surface. However, there were 2 other observations made:- 1. dropping non-soluble particles, e.g. silica or sand, do not create this effect. 2. dropping certain soluble particles, e.g. coffee, do not create this effect.

I had a bottle that had the consistence of milk hug plastic. It was fill half and half water and hydrogen. I left it to sit for a week at room temp. and half the hydrogen was gone. Did it leek though the plastic or did it turn in to Dihydrogen Dioxide?

http://www.scienceforums.net/forums/showthread.php?t=14951 I've never heard of this experiment before (the one with the decaying phosphorus). Care to elaborate, YT?

Hi everyone I've a question for u... We use lots of clolored soaps in our daily life. Yellow, Green or Red ect. I've just want to know how these colored soaps dont give color to our hand while we re washing our hands? All the soap foams seem colorless. So how Chemists provide color to the soap which can not be observed while they re been used. Thanks Specialist

I have discovered a fifth matter of state while browsing online but I don't know if it is reliable. Everyone knows about Solid, Gas, Liquid and Plasma but I have discovered Bose-Einstein Condensate. It is formed by bosons cooled to temperatures close to absolute zero. Under such conditions most of the atoms collapse into the lowest quantum state. BEC is before Solid so it should be the 1st state of matter. Below is the theory: Tc is the critical temperature, n the particle density, m the mass per boson, h Planck's constant, kB the Boltzmann constant, and ¦Æ the Riemann zeta function; ¦Æ(3 / 2) ¡Ö 2.6124.

Hi guys. I'm trying to figure out how to do this question. It was on a test at the beginning of the year, and now I have to know it for the final. You have a galvanic cell based on the two half reaction: [ce]Cr2O7^{-2} +14H^+ + 6e^- -> 2Cr^{+3} + 7H2O[/ce] [math]1.33V[/math] [ce]Cu^{+2} + 2e^{-} -> Cu [/ce] [math]0.34V[/math] The anode here would be the Copper, so you would reverse the reaction, and make the voltage negative. The Question also gives the following information: "Calculate E for the cell assuming a pH of 7 and that all Cr and Cu containing ions have a concentration of 0.10M. Assume standard conditions" We then …

I'm trying to find some information on how to find a way to diffuse hexane and HCl, but as they're both in liquid form, I would have to change the system parameters. Is it possible to find their diffusivity constants using pressure readings?

I tried looking up information regarding the BET Theory (http://en.wikipedia.org/wiki/BET_theory), but I was unable to find anything related to assumptions made from the BET Theory. Background: I'm doing a lab report on physical adsorption. A discussion question asks "Consider each of the five assumptions inherent to BET theory..." I understand the equation as listed in Wikipedia, but would anyone know assumptions that were made or can be pulled from the equation?

I wasn`t sure where to put this, either here or Physics? but here goes... I`ve basicly built a a Vacuum tube with a conductor at each end that I may pass electricity into, + one end and -the other. to increase the vacuum potential, other than removing as much air as possible whilst very hot and sealing the glass evacuation tube, I also added half a gram of Lithium metal into the chamber prior to this. in hopes of removing any residual gasses incl Nitrogen. I`ve just applied roughly 25kv across these 2 electrodes and have the most beautifull Pink Arc going between them. How is this possible? lithium cannot be a gas at room temp, and the vacuum isn`t THAT GOOD…

If I know k for a first order equation how can I find the point in time where a given percentage of product has been used up. I only know k and not beginning or ending concentrations.

does anyone know of a nonspecific nitric oxide or nitric oxide synthase drug inducer? not LPS or any cytokines. Thankyou.

Hi I am trying to get some idea of how to calculate how the rate of oxygenation of a liquid (say wine) changes with increases in both surface area and turbulence, which increases the suraface area. Any idea of how I might calculate this would be greatly appreciated. Cheers Drew

Ok, so Linear Free Energy Relationships (LFERs) are used to follow the substituent effects on the kinetics or Keq of various reactions. Everything is compared to benzoic acid and what not. Anyway, so what's the prediciting power? Is there a universal Hammett plot that provides predication for any reaction of say the same type (i.e. Sn2) Also, if anyone has any insight as to how LFERs are used to determine affects of mutations in enzyme catalytic sites, I would love to read that too. Thanks

I Saw A Show Television(About Chemistry) And They Had An Experiment. They Had A Flask Liquid And A Clear Gas Then He Shook The Flask And The Liquid Turned Blue, After 30 Seconds It Turned Clear Again. Its A Reaction That You Can Do Over And Over Again. What Was The Liquid And The Gas?

Hello, I'm in first year Chemical Engineering. Our final project is to build a treadle pump. It's basically a column with 2 check-valves, an "o" ring and is dependent on reciprocating force to pump the water. Maximum suction lift is an important principle that all the groups are having trouble with. Through research, I have found that it is by definition, the maximum height that water can be lifted. It depends mostly on altitude (atmospheric pressure) and also on suspended particles, density of the fluid, and frictional loss. For sea level, the typical maximum suction lift for water is ~25" or (6-7m). Now, each group was interviewed by our professor and he ask…

I'm having a discussion with a co-worker about the upper limits on the size of a Buckyball. He feels you could create a buckyball the size (surface area) of a bowling ball. I was pretty sure that once the the molecule got above a certain size the 'closeness' of the atoms and the massive numbers involved would create a gravity problem. The gravity of such a dense collection of atoms would defeat the molecular bonds. Neither of us are chemists, but we both think we know more than we probably do . So we're both going to be hard to convince we are wrong. If there are any good sources you could point us to, it would be appreciated.

Has anyone tryed Electrolysis by mixing 30% h2o2 with some sodium chloride and running 12vdc to it? i put 2 iron nails in this mixture and ran 12volts to it, it bubbled and gave off so much gas/heat and around 3cm worth of iron had disapeared within 5minutes