Applied Chemistry

I know I already started another electrochemistry-related thread, but this one is about a slightly separate subject. I was looking to use water electrolysis to yield hydrogen and oxygen in separate containers. For the most part, I think I'd know what I'm doing, but there's some things I'd like to check on. First off, what would be a good (ie. safe and/or efficient) electrolyte to use for at-home electrolysis? I'm guessing that the electrolyte itself would undergo electrolysis as well... which is why I'm hesitant to use table salt, as that would supposedly yield chlorine gas. (Inside the same container as oxygen, I presume?) So far I'm considering baking soda, or vineg…

Hello. Can we make a list of typical household and over-the-counter chemicals that are obtainable without "prescription' in supermarkets, hardware stores, but not from chemical specialty suppliers ? Like: Sodium bicarbonate Rubbing alcohol Acetic acid (vinegar) Turpentine Acetone Gasoline Kerosene Diesel Naphta Butane Sodium chloride (salt) Paint thinner (whatever it is) Sodium hipochlorite? (the water softener stuff) Epsom salt Borax Graphite (pencil leads) Oils Methylethilketone Cyanoacrylate Please add, rename properly and do corrections... Miguel

Now there is alot of studies done in solubility of CO2 gas IN water, however I'm trying to get water solubility in CO2 environment, condition(155C, 600psi) so i get a sealed chamber, which is connected to a camera then get a drop of water in the tip which is focused by a camera. water drop seems fine when chamber is under 600 psi with no temperature, but then water simply dissappear when it is heating up to 155C. I don't quiet understand why water drop is gone so quickly (~5 second) because it is under some pressure. Im not convinced its evaporation.... anyone can explain the phenomena? or any suggestion to conserve my water drop so i can monitor its v…

Hi everyone, I was just wondering, because I did this experiment in which we had to oxidise 2-methoxyphenol to get vanillin. Use use nitrobenzene rather than any other common oxidising agent like potassium permanganate etc. I was wondering what that was? Could it be that oxidising agents like potassium permangante need to be acidified and this can dehydrate the hydroxy group on the 2-methoxyphenol and so we dont get the desired product? I am just curiuos!. Your suggestions are appreciated!

Oh yes, Im having a hell of a time trying to find in detail recipees, protocols or whatever you want to call them for the catalase hydrogenperoxide assay. And not the kit things.If someone has the Beutler method recipee, well, yoopieeee!! And I mean real details , the composition and molarity of the buffer and the reaction mixture, the volumes , everythin. Oh and please dont forget the calculation formula in the end! Yeah, this is just as it looks like- HEEEELP!

have you ever used chemkin 4.1 software? I registered and login with my account on reactiondesign.com but i couldn't download it. please tell me how to download it,thanks!!

Terms: 1 gallon of water weights 8.6 pounds 1 BTU is energy needed to raise 1 pound of water 1 degree F 252 calories is equal to 1 BTU 1 calorie = energy to raise 1 gram water 1 degree C. 453.6 grams equals 1 pound Question: So here is the question, if i was to take 1 gallon of water at say 35F and drink it over the course of a 16hr day the amount of energy needed by my body to raise this water up to 98.6F before it is urinated is to high to be possible in my opinion. It is something over a hundred thousand calories burned. Yet I know it is possible to do. 16 cups = 1 gallon over a day is just one cup of nearly frozen water an hour. So how does the math jive…

Ok! It's probably a stupid question but I cannot find any in the catalogues I have looked at. You know what I mean, the tubes we use to connect apparatus via holed bungs and PVC/rubber hose. I cannot find any on Ebay except one in the US and that is flint glass. Will this suffice or can you point me in the right direction to get some better type. Thanks Larry

I need a water soluable inert solid material. It is to be mixed with a water soluable pH Buffer in order to dilute the concentration of the final material. Any recommendations? Thanks. Dave

Hi, im new to these forums and I figured I should come onto here and ask some of my questions on here. So recently (Not for school or anything just for a fun little experiment here at home with my girlfriend) I started to make alum crystals. I started lastnight and brought about a 1/2 C. of water to about boiling and added the alum to get the water supersaturated. Well I left it overnight and I got alot of little crystals. When I was looking on the internet I got the instructions on how to make a big alum crystal. Well I was going to use one of those little crystals as a seed and tie some thread around it but they are just too small to do so The solution has been sitting…

Hello. I need the assistance of those with experience with fuel cells. Currently my friend and I are researching them, and we have experimented lightly with very basic fuel cells. Yet in our research we have come across PEM fuel cells, and we have not found a decent guide to constructing one. Does anyone here have experience in this field, and can assist us. Or does anyone have a link that can assist. Thank you

In a recent class of mine we went into a deep conversation about water. We went into the breakup of water, its importance to organisms, etc... We soon came to the issue of hard water, and how it can affect us. One scholar recalled a documentary of heavy water. To this day I have not found a reliable source to any valuable intel relating to this subject. Please point me into a direction that my help me to find information regarding heavy water.

I do not want to offend any one with this question, but what do chemists actually do? Hasnt the periodic table been mapped out etc... Is it really a science anymore or is it just an engineering disipline now? Dont get me wrong, chemistry rocks, but is there really discoveries to find still? Thank you.

Hi, I would like to conduct a little research on my own to help bolster my resume when it comes time for me to graduate in a few years. I recently changed my major to chemical engineering and immediately received a scholarship so I kinda feel obligated to move forward fast. Anyways, I've been racking my brain trying to think of something that's easy enough for me to do, yet hard enough for them to let me do it and I came up with testing municipal water supplies for the presence of antidepressants and the possible affects on the average city dweller. My question is this, is there any quick test I can use to detect the presence of pharmaceuticals in tap water. What …

Hi, this is my first post on the forum. So firstly, Hello. I am a late bloomer, in the science community, being 44 and father of two (just about)adults. Secondly, as per the title. I have searched for but not found an answer. How can I tell when the end point or AN end point has been reached? I have read that the end point is reached when no more HCl(g) evolves. However, with the amount of reflux that happens how can you tell if the gas has stopped evolving? Or is the end point when the reflux starts? I perhaps should say WHY I want to make HCl(aq). Well I cannot go out to a supplier as my disability means I cannot walk far or drive any more. I also cannot find a…

I'm trying to make a fuel gel using the by product of biodiesel production glycerol. I'm finding difficulty in forming a good gel. If I mix acetate with glycerol it won't form a gel when I add ethanol. If I make the gel first the glycerol just makes everything watery. Any help?

So, as an A level chemistry student, I'm conducting an experiment into the decomposition of hydrogen peroxide, using manganese dioxide. I'm currently investigating the pH, and I have some very confusing results which I don't actually have any explanation for as of yet. Hydrogen peroxide is supposedly more stable at lower pHs, yet at pH 4, (with a phthalate buffer) more gas is being produced and at a quicker rate than at pH 6. Can anybody help me and help me explain this?

Hi everyone! For a school project I want to use the next reduction reaction in a galvanic cell. O2 (g) + 2 H2O(l) + 4 e- --> 4 OH- (aq) (+0,40 V) But I don't know how to construct the half cell where this reaction occurs. Please, can somebody help me!

I am considering building an 'aluminizer'... but I can't find a lot of detail in how they work. I know that they use a vacuum chamber, and then elements heat up and evaporate aluminum which then deposits on the glass surface. But how hot do the elements have to be? and can it be any old piece of aluminum, or does it have to be a certain thickness/size/shape? Are the aluminum and hot elements above the glass and the Al travels down to deposit on the glass, or its it the other way around?

OK so I got my luminol today and I've been reading various demonstration sheets across the interwebz and seen that people use various different combinations of oxidiser and catalyst. So i've read that you can use Fe2+ or Cu2+ or other metal ions to catalyse the reaction, but potassium ferricyanide seems to be a popular choice. My question is this: why bother to use such an elaborate compound when copper sulfate works just as well and costs a fraction of the price? I've got both and i'd like to find out why people choose one over the other in case it'll save me time trying both of them out.

Hi friend. Iam khubaib. Iam new to this forum. I'm having a science fair by the second week of november. But i have to submit it by tomorrow. I chose the oobleck as my project. Well could you please explain me how the corn starch works with normal water, salt water and sugar water(Experiment with explanation). And how much quantity we must need for each experiment. This is a comparitive experiment, so i am testing with different solution. And also tell me how it works with other liquids like milk and some others ( which one you know). Please, any help would be appreciated. Thanks.

Hello. Just saw announced/shown on television an experimental 'old' car running plastic scraps into a gasification reactor fitted in the engine compartment, yielding 30% less fuel consumption. The small device appeared to be about 1 litre size. How does it work ?

why is the order of addition of the ingredients important in manufacturing liqueur ? And what happening in aging process in manufacturing liqueur ?

Hi every one. why water in glass is warmed and the glass cup warmed slowly?

hi, I can really use some help. How would you convert ethanol substrate from 50 microlitres to micromoles/ unit? i dont know if this will help but the ethanol substrate was made as follows 1 mL of ethanol (95%v/v) was diluted with 199 mL of distilled water making the final concentration of the stock 100mM. 15 mL of this stock was thenplaced with 85mL of a buffer solution to make the final concentration 15mM. This stock was used for the enzyme assays.