Applied Chemistry

My name is Nathan Pedde. I am a, currently, unpublished author. I am currently working on a post-apocalyptic book about the failure of modern technology. More specifically, the failure of electricity. As such, I need help with a couple small details in my book. I have tried libraries and all sorts of web pages. None of which have made me successful in my search for an answer to a question of mine. My first book is about the disaster itself. It is almost done. I am currently working on the first draft of book two. The second book takes place many years after the initial disaster. Electricity still doesn't work properly and civilization has turned into a multitude of s…

Can you help me with these two questions please If 4.436 g of NaOH was added to 150.0 mL of water and we assume the density of water to be 1.000 g/mL Then what is the total mass? Given that the temperature change observed was 11.5 C when4.436 g of NaOH were added to 150.o mL of water, What is the heat energy in kJ that is produced. (Don't forget the specivic heat of this solution is 4.06j/g C and assume the density of water to be 1.000 g/mL) Thanks

I am relatively new to rocketmaking as a hobby and was wondering if there was any way of preparing rocket fuel for small miniature rockets without the use of potassium nitrate. The rockets that i make are around 4/5 inches high and weigh around 100g. The reason that I dont want to use KNO3 is that the stores that I know of that supply me with it have all slowly stopped supplying it due to bans and are forced to re-stock.One store does sell a fertilizer with soluble potassium oxide and nitrogen but thats as close as it gets to pottasium nitrate I'm hoping to use more simpler and more common household ingredients to be more independent of garden stores and pharmacies. …

We're in the process of getting our solvent recycler to work with the vacuum distillation of ethanol. The purpose would be to be able to boil the ethanol off at a lower temperature to preserve the quality of the contaminant. The boiling point of ethanol is 79*C and under vacuum (28 inHg) it drops to around 34*C. We typically use a rule of an additional op-temp of 50 degrees Celsius above the boiling point of the solvent is enough to boil the solvent and maintain that boil. In the case of Ethanol, we would use an op-temp of 130*C. Under vacuum we can assume that we would need an op-temp of around 85*C. What we have found is that we still need to give the ethanol a…

Do any of you know a way in which I could succesfully extract sodium from salt? Obviously displacments out of the question as I cannot get my hands on any highly reactive metals but would electrolysis be succesful. If yes what solvent would be needed as I guess water could not be used due to the formation of NaOH? Realsitically is this possible with my limited apparatus or completely out of the question?

Just wondering if there are any other pyrochemz out there.... if there are... lets start a thread... on pyrochem only... btw just wonderin what is the easiest flash to make,... like with the easiest ingredients to obtain... post lots chill out and have fun

Ive recentley made a spud gun. I use a good flammable propellant, but i need an easy to make ignition system. Without using piezos or BBQ ignitors, or sparkplugs, can anybody help me by telling me how to make an alternative ignition system. Im only 13. Please help...:flame:

Hi Everyone, I'm new to this forum. I was reading a thread in your forum from last year that dealt with cleaning silverware with ammonia. The discussion got rather heated at times. I didn't understand all of it, but I don't believe any of the thread addressed my problem. I just came back from the silversmith who charged me $20 to remove a small area of extensive corrosion caused by salt in a sterling silver salt cellar. Silver polish had been ineffective at removing the corrosion. I suspect that I got ripped off and believe that if I only knew the proper "do it yourself method", I could probably take care of this prolem in the future for mere pennies, some time,…

Mods: Is this acceptable, I am not asking people how they made the stuff, where they got it etc. I'm just wondering what the most dangerous thing you think you've seen / used I saw these when we were clearing out an old cupboard in the chemistry lad last week: I think the most dangerous chemical I have ever seen was something labelled [ce]Hg(ONC)_2[/ce] and it was in the back of one of the school chemistry cupboards... I did some reasearch and this stuff is explosive. My chemistry teacher said he never knew it was there - he said it has probably been there for years, the next day the bomb squad were called up to remove the stuff... I just wish I could have seen i…

I had a container with bleach, and at the end of a tube bleach has been slowly dripping out. I discovered a small puddle of bleach and lots of white crystals around the edgs and in the middle. Does anybody know what these are?

what is the best solvent/acid/base for dissolving the plastic found in dolls? i want to do a video of a certain annoying canadian 'singer' metion no names dissolving. but seeing as dissolving the actual person is unlawful, the next best thing is to use heavy chemicals and a plastic doll

I'm now in my own apartment for the fall, and I noticed that the oven's dial goes up to 500 degrees fahrenheit. According to twn.ca's conversions, that's 260 degrees celsius. And then I remembered when I read recently about tin, and recalled that it melts below that temperature. So theoretically, I could use my home oven to melt tin and reshape it... such as by placing a tin can (with the paper removed and the remains washed off, if I can) onto some baking sheet and making a sheet of tin. Or adding some spoons and forks or whatever and melting imprints onto it or whatever. Of course, I have a few safety-centric questions about doing this. 1. Is there any chance th…

So basically this is the situation. Gonna be acid treating some starch with some dilluted hydrochloric acid solution, then before we pitch it we gotta neutralize it with baking soda, sodium bicarbonate. I think baking soda's pH ~8? Anyways, just need to figure out how many normal NaHCO3 vs how many Normal of HCl to add. Solution is gonna be: 25 mL H20 (heated) 30 mL HCl (added) = 55 mL total If I could get some help in how to approach this that would be great, I'm still a little ambiguous. If I'm missing details sry, just maybe give me an overall idea of how to do it lol I'm supposed to use Normality too, of HCl in comparison with normality of the Na…

Is there a mathematical way/formula to find the number of water molecules in hydrates? If someone knows the formula, could you plz also show steps to coming to that formula. Thx alot

I'm studying for this chem. quiz, and I'm having trouble with this concept the proffesor barely covered, yet is going to be on the quiz anyway. Calculate the pH of the following solutions. a.) 0.10 M CH3NH3Cl b) 0.050 M NaCN There are other examples, but I can't figure out how to calculate the Ka of the solutions.

I have a question. What is the chemical composition of dirt 1st of all. Second of all, can dirt melt? And if it does melt what does it become. If it doesnt melt, why not? Thank You.

Read somewhere that the felt pads placed on car battery posts were impregnated in baking soda. Baking soda works extremely well in removing corrosion formations, but for prevention, something does not 'click' These work very well; what are they impregnated with ? It is not dusty, it is not oily, it is not wet : http://www.therangerstation.com/Magazine/Fall2008/battery/felt_ring.jpg And they have lasted many years in my cars doing an excellent work.

Can someone please help me with this problem? a gas was found to have a density of 1.13 g L-1 at 22.0 C and a pressure of 755 torr. What is the molecular mass?

I have about 2cc of 0.1mm particles (and smaller), some of which are flakes of placer gold but most of which are common mica. I want to separate these. A centrifuge would be useful -- if I had one, which I don't. The particles are small enough, as is my skill in the technique , that panning is suboptimal. So I'll try falling back on straight chemistry to remove the mica threads from among the gold. Short of HF, what would be good for dissolving the mica fragments? YT2095 says that heated solutions of some common hydroxides (NaOH, KOH, LiOH) will attack glass (and I'm extrapolating to hope they'll go after other silicates), but my first attempt -- glass in boil…

Is there a material that expands or contracts when electricity is introduced? For example if the material is in this shape 0 then electricity is introduced it turns into this o or vice versa. Thanks in advance.

I am reading the book Quicksilver which has the running theme of alchemy and natural philosphy. Well, at one point someone discovers that you can get this cool stuff that glows by boiling some urine, so it gets demonstrated in the courts. Anyway, can you realy extract phosphorus from urine? If so, how? Has anyone here done it?

Hello. I'm an independent jeweler living in the Detroit area. I would like to know where I can obtain some Potassium Cyanide for gilding and buffing. Can anyone tell me where to get some?

I have a London Fog suitcase and traveling bag from the Chatham Collection. It was designed in the United States but made in China. They both have a warning on them saying "Warning: This Product Contains Chemicals Known To The State of California To Cause Cancer, or Birth Defects or Other Reproductive Harm." It does NOT say which chemicals. Nor does it say the ways in which someone would become exposed to them. From what I understand if these chemicals are in there in significant amounts this label must be on the product in California even if it's not something you would eat and the only way to be harmed by the chemicals is to eat the product. But I don't know…

I cannot work out this 1H NMR spectra of d(+) carvone. The peaks have (from left to right) the relative intensities 1, 2, 5 and 6. This adds up to the 14 protons that carvone has, but apart from that I can't work out which peaks correspond to which proton environments. Thanks for any help.

This is a (conceptual) engineering problem (not homework, I'm not in school anymore)... And I thought I'd entertain you all with it. Perhaps it should be moved to engineering, perhaps it should be here in applied chemistry. The problem: there is a stream of 5% glycerol ([ce] C3H8O [/ce]) and 94% water, 1% salts. The flow is 5 kg/s (large). Temperature is 99 deg Celcius. The whole stream is in the liquid phase. Pressure is atmospheric. How to obtain a clean glycerol stream from this at low cost (cost effective, glycerol is the only product of any value)? I have considered: distillation (not very elegant in this case, salt remains in the glycerol) extrac…