Applied Chemistry

how do i know when to incorporate the Kw constant into the calculation of the pH of an acid? eg. i have 1x10^-8 mol dm^-3 HNO3. a ridiculously small amount of acid in water... this means that the H30+ from the dissociation of the water actually is greater than this acid: 1x10^-7. my question is how do i know not to incorporate it into an strong acid equation.

Industrial Method: PO4-3 + C + SiO2 --(1500 or so celsius)-->P + SiO3-2 + CO2 the phosphate should be an alkali or alkaline earth. the carbon alone COULD work, although it would require higher temperatures to oxidize the carbon to form the carbonate. at lower temperatures the phosphide would be produced instead. as long as we are considering high temperature reduction, let us consider my recent hypothesizing: PO4-3 + Al --(quite high temps but not as high)-->P + Al2O4-2 not too cost effective and certainly with low yield unless really high temperatures used PO4-3 + Al + S --(considerably cooler than industrial method)-->SO3-2+Al2O3 my only r…

refer: http://www.lateralscience.co.uk/C60/C60.html and more specifically: http://www.lateralscience.co.uk/C60/C60pics/C60app.jpg my question is how one could produce such an apparatus at home. the concept of making fullerenes fascinates me, although i really dont know what to do with regard to apparatus setup. also, is it just me or is that letter really amusing?

I was reading about a neutron capture experiment http://www.dartmouth.edu/~physics/labs/p1/lab4.pdf Silver was placed in a paraffin block with Americrum (as an alpha source) and Beryllium to produce neutrons. The paraffin was supposed to slow down the neutrons or "thermalize" them so they can be captured. According to this lab, Ag when bombarded with slow neutrons will capture them and then decay to eaither Cd or Pd depending on the isotope of Ag. So my question is how long would you have to expose the Ag to the neutrons to convert a majority of it to Cd and Pd? And once converted can these elements be seperated? Basicially i want to know if i can make a valuable e…

I have an aqueous solution containing i sulfate ions, what would be a diffinitive test for chloride ions without getting a false postive from the sulfate ions

i have been researching this compound and sources are conflicting one another, some say it breaks down to a chlorite or chlorate, others chlorine and oxygen, also some say it can be a liquid, others only a gas, some say explosive, some merely say it breaks down. Can anyone give me a DIFFINITIVE list of properties

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?

Sounds easy, but it's giving me problems (mainly because I haven't worked with organic compound questions all that much). Any hints from you guys as to what to do? So far I have converted the 25g to moles, and when I attempted putting my answer in the Kw = [H+][OH-] equation I got the wrong answer...

What is the best chemical for pulling water out of the air and where can I get some in semi-large quantities?

ok, so im going to be making some rocket propellent. it will consist of ammonium perchlorate, aluminum powder, HTPB, isonate, DOA and HX878. my question is. i want to make a green flame propellent, and i want it have almost the same ISP as the above propellent. now, what should i use to make i green? wont barrium nitrate slash the ISP?

I need to purify some water, but I don't have one of those fancy moonshiner gadgets. I was wondering what you guys use to distill things. Would a clean cup-at-a-time coffee maker distill the water well, since it heats the water to steam which then condenses and drips through your coffee?

Is there a way that you can tell how concentrated a solution must be for it to be saturated? For example, suppose I want to make a saturated NaCl solution in water. How do I know the maximum molarity possible and thus how much NaCl to use?

I've got a question about manufacturing those gas-discharge tubes which you can use to 'see' gasses. For my element collection, I picked up a set of tubes which were bent into the shapes of the symbols for the element they contain. (I bought them from Max Whitby a few years ago for my Noble Gas samples. They are INSANELY awesome looking). So while I have my noble gases in the form of a discharge tube, I don't have the same for my hydrogen, nitrogen, and oxygen. I asked Max if he'd be able to custom build those tubes for me, and he declined saying that the heat given off by hydrogen, nitrogen, and oxygen was too risky. I do know that those gases give off a lot of hea…

I recently bought around 90 lithium batteries from a government auction. They are the button type measuring a little under an inch across. What could i use these for? besides their intended electrical use. When disassembled there are 2 halves, one is full of what appears to be carbon powder and some sort of electrolyte, and the other side is just a chunk of Li metal. One neat thing i discovered is that the Li ignites from friction and violently burns a hot red colo(u)r. It burned so hot that it ate away a little crater in the concrete. I like to make fireworks and was thinking the Li could make some nice effects. I have lots of KNO3 and was thinking about trying to is…

How can I find or will you genusises out there tell me the burn rate of Potassum Nitrate & sugar in a 60-40% mix (the potassum being the 60)?? please help me

Hi, I have a question on measuring ingredients. All the ingredients and procedures I find are in "parts". For example, it is like 35 parts...whatever and 4 parts...whatever. How can I determine how much to add? Is there a formula?

Does anyone know if gas chromatography could be implemented to measure alcohol levels in blood? Or used as a type of breathalyzer? If not, what yould be another method I could use to measure the amount of ethanol in a solution??

Check this website out its quite fun.... we were told about it in our lecture today which was quite amusing... http://www.geocities.com/le_chatelier_uk/song_index.html Have fun!

how could you find the pH for a .001 Molar solution of HCl? or what about .050 M of NaOH??

Where could one find structure pictures for the bit more complex molecules? I mean, you can easily figure out a simple compound's structure but when there are like 20 carbons and dozens of other atoms involved, the chemical formula just isn't enough. I found Wikipedia to be a rather good source of such structures, but they aren't always featured for every compound. I became rather annoyed when I couldn't figure out myself what a hexamine molecule looks like (no YT, I don't want to manufacture it or anything ).

Now that YT even had to post a thread about the illegal HE synths, I was wondering: What sort of compound synthesizing is absolutely illegal? Would someone mind guiding me to a page or source that concerns this (for the U.S. for example, as their restrictions seem to be quite the same as they are in European countries, and just about any country)? I especially would like to know more about the legality of synthesizing corrosive, potentially poisonous or sensitive materials. Of course, I have basic understanding of this, in the lines of "you're not allowed to make amphetamine".

flask X contains 1 dm3 of helium at 2 kPa pressure and flask Y contains 2 dm3 of neon at 1 kPa pressure. if the flasks are connected at constant temperature, what is the final pressure? any ideas on how to solve this?? -mak10

I have some exploding targets, that a friend gave me. I get .25 kg of a white powder (assuming its a nitrate) and a table spoon of silver powder (Mg? Al?). When mixed they need a no. 6 blasting cap or a 30-06 bullet to set it off. And man is it loud!!!!!!! I want to know what it is. You cant burn it, or shoot it off with a .22 cal or even a .357 mag...

A gas X is 42g/mol A gas Y is 56g/mol If both gas are in mixture, the mixture is 42g/mol which gas in that mixture is more abundant??? X or Y?? Can any one explain to me in details as well?? thx Albert

How to find the molecular formula of the below question?? A gas with 87.5% of Carbon, and the remainning is Hydrogen, if the gas is 56g/mol, then what is its molecular formula?? Can you guys also show me the calculation?? thx in advance Albert