Chemistry

My friend and I are pyrotechnical enthusiasts. We have recently looked into making flash powder with seven parts potassium perchlorate and three parts aluminum powder. Just how sensitive would this mixture be?

Im looking for a substitute for butane, (and co2, since I dont got the equipm.to make it safe enough DIY) Its certain aromatic oils in some swiss seasonflowers, that I want to extract without getting all the other fatty stuff\lipids in the extraction..Butane is too dangerous, and co2 needs far to high pressure too work with. (I have to do several runs)

Hey guys I want to learn how a simple reaction works. Could someone please break this reaction down and explain to me how the reactants become the products? I would like to be able to look at reactants (or products) and be able to derive the compounds or molecules created or made of... Thanks NaOH + Al + H20 ------> H2 + ? What are some hints if any to help me be a better future chemist?

Hello! I am a high school senior taking an advanced chemistry course. I have been working on this problem for two days straight, and cannot figure out our error. Here is the problem we are given: Calculate the standard enthalpy of formation for the reaction HCL (g) + NH3 (g) ---> NH4CL (s), given the following thermochemical equations: H2 (g) + Cl2 (g) ---> 2HCL (g), standard enthalpy of formation: -184kJ (-92kJ/mol) N2 (g) + 3H2 (g) ---> 2NH3 (g), standard enthalpy of formation: -92kJ (-46kJ/mol) N2 (g) + 4H2 (g) + Cl2 (g) ---> 2NH4CL (s), standard enthalpy of formation: -628kJ (-314kJ/mol) It wants us to combine the equations using Hess's Law …

Hey guys just joined this forum because of my new love for science I have just started college and today we was performing a basic experiment involving separation of molecules in a mixture. This mixture had NaCl Benzoic Acid and Sand. In one step we turned the acid from a solid to a liquid by adding a base (which I have no idea what it was). Adding the base turned the acid into a liquid which we then filtered to separate from the mixture. Once seperated we added some HCL thus turning it back into a solid. My question is how exactly does adding a base or acid change the makeup of the molecule? Just curious as to how this works -thanks

Hi Can anyone tell me how to get potassium from potassium chloride. I''m a newby to chemistry. So all help is appreciated. R

I need to know how to test food products for adulteration. These days companies in India are mixing various chemicals in food product to increase production and serve bigger population. They just want to make money and local government and police dont do a single thing to stop them because they get bribe. Very few people and NGO have taken the task for testing food but considering huge population of India, they are very few. I had learnt some basic techniques back in school but want to learn as much as I can. some common food adulterations here:- 1-milk+fertilizers+water (we don't get pure milk) 2-fruits+carbonates (to ripe fruit faster) 3-honey+antibiotics+fe…

ok i just bout some amorphus boron for my element collection and the seller states its about 90-95% pure, the largest containment is magnesium (not sure if its metal or what compound) is there any way to up the purity of the boron. i know this is hard to answer since we dont know what the exact contaminants are but any assistance would be appreciated

I am currently in the process of writing a science fiction novel. To make sure it sounds genuine, I was wondering if anyone could help define what kinds of minerals and mineral properties would be likely within the following areas of space: Pre-Nova Star systems Post-Nova Nebulae Deep Space Asteroid Drift (Zero-G) Close orbit asteroid belts Asteroid belts in heavily magnetic region (magnetars) Gases in Stellar Nurseries I'd also like to know how the following mineral properties are created (where in the universe these properties are likely to be found): Electro conductivity/resistance Electromagnetism Thermal conductivity/resistance Highly ductile/mall…

Please have a look at the attached image. What could be the reasons for the bulb not glowing? One reason is the use of a weak electrolyte.....what could be the other reasons? Thanks, Ron

Hello to you, I am interested to learn how Nucleotides are produced and stabilized [by chemical synthesis, or bio-chemical process] If any of you could refer me to production processes, that would be very much appreciated ! Thanks in advance, Vs1

Does Helium have molecule inside it? Does Sodium have molecule? Tnx

Recently I accidentally stoppered a flask with a stopper that was too small. It still plugged the top of the flask, but it was in real deep (no, I don't mean that... ) I managed to get it out (it was hard) but it came close to actually falling into the flask. Had it actually fallen in, it wouldn't come out if I just turned it upside down. How would I get it out? It's a 500ml filtering flask in case it matters. The stopper it came with (used for the Büchner funnel) did not have its size labeled, but the one I tried to use (that was too small) was a #7 stopper.

I am a freshmen at Penn State and I'm going for chemical engineering. I've heard that joining a professional society is a good way to learn about your profession and help network. I was looking into joining the student division of ACS but I'm not really sure of the benefits. Is anyone a member of ACS or another professional chemistry organization? I'm just looking to join on that would help a student, maybe have seminars, a subscription to their journal, networking. I'm not really sure what to expect from these groups. Any opinions or answers?

Fe3+(aq) + SCN- (aq) <==> Fe(SCN)2+(aq); exothermic 1) Half-fill two semi-micro test tubes with Fe(SCN)2+ solution. 2) Place one test-tube in ice-water. Carefully heat the other test tube until the solution almost boils. 3) Compare the colour of the mixtures in the two test-tubes. Recrod your observations. H3PO4(aq) <==> H2PO4- (aq) + H+(aq); exothermic 1) Pour 1 M phophoric acid into each of two semi-micro test-tubes, to a depth of about 3 cm. Add two drops of methyl violet indicator to each test-tube. 2) Place one test-tube in ice-water. Carefully heat the other test-tube until the solution almost boils. Record the colour of the indicator in the hea…

I know I've asked about this before, but I was thinking of how to do water electrolysis in a reasonably efficient and/or relatively inexpensive manner. One idea I had was to set up a bucket, throw in some epsom salt (my current bag of epsom salt doesn't specify whether it's the heptahydrate or some other concentration of it though) and add tap water and stir until it's either all or mostly dissolved. Then I'd put in a couple plastic or glass bottles, (one about twice the size of the other) immerse them in the solution until they are filled, then find some way to fasten them upside-down (ie. the open end is facing downwards) and have electrodes set up so as to be insul…

So, is it true ~ that you have to maintain a perfect balance ~ that you can manage your acid/alkaline balance?

If everything is made of molecules and molecules can be reduced to atoms then why can't we see molecules with the naked eye?

Hydrogen azide, HN3, decomposes on heating by the following balanced reaction: 2HN3(g) ---> 3N2(g) + H2(g) If 3.0 atm of pure NH3(g) is decomposed initially, what is the final total pressure in the reaction container? What are the partial pressures of nitrogen and hydrogen gas? Assume the volume and temperature of the reaction container are constant. I actually balanced the reaction and put that up there but now I'm stuck! The answers: Total pressure = 6.0 atm Pressure of N2 = 1.5 atm Pressure of H2 = 4.5 atm I need EXPLANATIONS on how to get these answers. Please help!

Not sure where this really fits since it's been so long that I've been here (I didn't recognize that this was a new forum until I checked the URL...), so mods - if this is a wrong forum, feel free to move it. Thank you. This fall, I'll be taking Physical Chemistry as a part of my major. My issue is that I haven't taken calculus since my junior year, when I took AP Calculus BC exam and got 5. I'm strong at mathematics but because I haven't touched it so long (I'll be junior in college this fall), I'm worried that I'll be behind in mathematics for p-chem. So, I have two books that I'm considering, and I would appreciate any feedback from people who have used it or k…

1) If something causes an endothermic reaction does this always cause a higher yield in products if the temperature is raised? 2) If something causes an exothermic reaction does this always cause a lower yield in products if the temperature is raised? This is not homework, I'm just researching the Ostwald process and had some general questions.

I already understand how to balance a redox reaction, considering the environment in which they occur. However, I do not understand why do we need to consider that. I mean, why do OH- and H20 and H+ interfere with the reactions?

Hi, Just wondering if anyone could explain (basicly how this is made) kind regards Phillip Hobbs

Hi there, Just wondering if anyone could please explain this to me, as I am interested in how ethylparaben is made (for example) I thankyou in advance for your time Phillip hobbs

Hello everyone, C02 + H20 <---> H+ + HCO3- Now in respiratory acidosis. You breathe slowly retaining more carbon dioxide. Ok this would shift the reaction to the right but how does it raise the PH. HCO3- also raised the same amount. Thank you