Chemistry

Hello Everyone... One of the main reasons why I've joined up here is to contribute to the Physics (particularly mechanical physics / kinematics studies) forums, and hopefully spur some people's creative minds, and also to get some answers in the areas of chemistry that I'm not too well educated in... You see, I'm certified armorer and I'm currently designing some parts/accessories for various firearms on the market. I've been working on a few prototype parts designs lately, but I've also been hoping to do more research & testing in the areas of Metal / Steel Alloy Finishes & Corrosion Protection. I'm using my years of physics, MechE, and other knowled…

My son is trying to do a science experiment involving solar panels, electrolysis, and a hydrogen fuel cell. Basically, he is trying to generate hydrogen during electrolysis by applying solar power to electrodes in a water/electrolyte solution and then disconnect the power source after some hydrogen has been produced and then measure the electrical output of the "fuel cell" as the hydrogen recombines with the water. The variable in the experiment will be the electrolyte used. What relatively safe and easy to come by electrolytes should he choose from? Where would he go about getting those electrolytes? (One not-so-safe electrolyte he's read about is Surfuric Acid, and h…

I'm new to Chemistry...and just needed a little help naming these compounds... thanks. 1. SnSO4 2. Al(MnO4)3 3. Pb(NO3)2 4. Mg3(PO4)2 5. CuH2PO4 6. CaHPO4 7. Fe(HCO3)3 8. Na2CO3 9. MnSO4 10. Al(OH)3

I am writing a lab report from an experiment that requires you to test metal reactions by combining them in cold water, hot water and dilute hydrochloric acid and I am answering questions for the "Discussion" part of the report and one of the questions is "Did any metal(s) not react in your experiments? Which ones? What does this tell you about them? The tin, aluminum and zinc did not react. I am not what this tells me about them. I would appreciate as soon as I can get it. Thanks, Music man

Does corrosion require oxygen and water? I know rusting (a form of corrosion) requires H2O and O2 but corrosion in general is just an oxidation-reduction reaction, right?

Hi. There is household products in liquid and in powder forms intended to be added to water, like in a laundry machine; but NOT to be used into water softening equipment. They are referred as 'salts' . What are these compounds ?

Hello! I have a little question about the solubility of calcium hydroxide.. Does the solubility decrease or increase when the temperture is raised? Your help will be very much appreciated! Thank you!

i know it can be frozen to be used in cooking at a later date; but can it be frozen to be drunk at a later date? how would the alcohol content be affected by the freezing process? and what about flavour etc?

An organic nitro compound is electrolytically reduced in an aqueous acetate buffer solution having total acetate (HOAc+OAc-) 0.500 M and pH=5.0. 300 ml of the buffered solution containing 0.01M RNO2 was reduced completely. The dissociation constant of acetic acid is [math]1.75 \times 10^{-5}[/math] at 298 K. The reaction is [math]RNO_2 + 4H^+ + 4e^- \rightarrow RNHOH + H_2O[/math] Calculate the pH of the solution on completion of the reduction.

hey, my aunt got me some "make your own snow" as a joke for christmas... i was wondering what sort of chemicals can provide a reaction like this, or are they just small bits of absorbant material that arent actually reacting or gaining water of crystalisation? http://www.makeyourownsnow.com/ thanks, if you can help!! happy new year

So I've made a very simple, ideal model of a heat engine, and my calculations just don't match up to the carnot thing: efficiency = 1-(Tc/Th) It looks like this: I supposed a rectangular block, base of 1cm by 1cm, and a piston free to move up and down this block without friction. Also suppose that the walls are completely insulated thermally (no heat can transfer through, as to not screw up our calculations). Now we know that 1 atm = 1.03323 kg/sq cm, and the piston is 1x1cm so it must weigh 1.03323kg in order to apply a downward pressure of 1 atmosphere constantly. Assume a vacuum outside our piston, only gravity pushes the piston down. So I've done 2 calculatio…

I am a primary science presenter and teach KS1 and 2 science. Often I am approached with amazing questions thought up by 7 year olds. One of these questions has me baffled and I wonder if anyone can help When explaining molecules I was asked what is inbetween molecules? We were discussing solids, liquids and gases. Myself and my collegues have been thinking about this for a while now and are unsure? It can't be nothing! Physically it can't be a vacuum, can it?? Any Ideas??

How to adjust the pH of cholindihydrogen phosphate solution with phosphoric acid to 4.0, 4.5, 5.0, and 5.5? cholindihydrogenphosphate is a type of ionic liquid with the following formula: [ce] HO(CH2)2N(CH3)3^+ [/ce] [ce] H2PO4^- [/ce] Can I calculate it using the Henderson-Hasselbalch equation?

If we add HCL to a river that is alkalic (due to a NaOH spill for example) to neutralize it, would it kill the fish ? Or would it save them from the NaOH?

Does any one know the substance that makes gel fuel crackle? I appreciate any help you can give me. Savanna

If we are made up of cells, cells are made up of atoms, atoms made up of protons neutrons electrons and they are made up of quarks and whatever else they are made up of......... then what are those things made up of.... and what are they made up of..... the list goes on.. How can we keep describing smaller 'things' to be made up of even smaller 'things' when we can keep going infinately? hope u guys understand.

Alright, so I have finals coming up and for some reason I get really really REALLY stressed out when I take chemistry tests. Just chemistry. I used to do this with all of my tests but I learned that I just needed to breath and be confident that I'm a very smart person. My question is, is there something that would make me feel less anxious on my test thus making it easier to get high scores? Maybe there is a real good chemistry site I could go to that would help me with my studying? Or maybe some method of prepping myself right before the exam? Thanks for you help guys!

I was going through my chemistry text book and found a paragraph about exceptions to octet rule. it says that in PCl5 phosphorus breaks the octet rule because it has empty orbital 3d. then it shows an elocton con figuration: 1s2 2s2 2p6 3s2 3p2 3d0. in an earlier chapter it states that before 3d can be filled 4s has to be filled as 3d has more energy. i'm confused here can someone plz help. thnx alot

can anyone help me come to a conclusion of osmosis and diffusion with carrot in salt water

The compound Ammonia is made up of one Nitrogen, and 3 Hydrogen. On the periodic table I see that Nitrogen has 7 protons, and 7 electrons. I also see that each Hydrogen has 1 proton, and 1 electron. I am told that Ammonia is held together through a Covelant Bond. My question is: how does this work? My only guess is that Nitrogen has 6 electrons in its 1st electron cloud, and only 1 in its 2nd. This would make it want more, correct? Also Hydrogen only has 1. This would make it want more correct? Please clerify this if you can.

Hello, I've got a few questions about Caustic Soda (actually anything you can tell me about it would be useful :D) What would happen if a truck containing caustic soda for example crashes and the NaOH flows into a river? Would the fish die? Is there a way to decontaminate this river? Maybe adding more water (or an acid) to neutralize it?

Hi, We just started chemestry at school and I'm really not getting it very well... Here is an experiment we did in lab that I don't fully understand (the purpose..): we got this sample of a this contaminated river and it had pH of 9. I took 5ml of it then added 0.16ml of HCL (at 1mol/ml), and it now gives us a pH of 7... Is there a way to get the concentration of the first liquid out of this? I really don't understand this stuff....

This is an odd question, but hear me out. "We could be an atom to an atom to an atom, we could be in a grain of sand." My friend made this philosophical observation when we were hanging out earlier. I said that we couldn't, and we argued about it. First I asked him if he thought that we would be made out of the same "fundamental stuff" He said why not, and I made some observations. Quantum particles(?) compose larger particles, particles compose atoms, atoms compose molecules and compounds, and so on and so forth all the way up to biological systems like us. To this he quickly agreed. So then I made the statement that the universe m…

What is the standard Heat of Reaction for the chemical equation of: CuSO4(aq) + H2(g) => H2SO4(aq) + Cu(s) Of course, if I just knew the heats of formation of both CuSO4 and H2SO4, this could be solved much more easily.

hi all can anyone please tell me, What energy tfransfers are used to operate a wind-up radio. thanx carl1