Chemistry

What could discolor a platinum ring? My wife's wedding band was discolored by something when she was cleaning up, she said she thought it was chlorine bleach, would that be reasonable?

Hello I'm trying to get a hang of oxidoreduction reactions, and stumbled upon this one; the question is to fill in the coefficients: [math]\text{Cu}+\text{HNO}_3\rightarrow\text{Cu}^{2+}+\text{NO}_2[/math] After doing what we saw in class, I reformed it to this: [math]\text{Cu}+2\text{HNO}_3+2\text{H}^+\rightarrow 2\text{NO}_2+2\text{H}_2\text{O}+\text{Cu}^{2+}[/math] I know that [math]\text{H}_2\text{O}[/math] can be formed as an 'extra' (which has been used to make the O's equal on both sides), but is the same true for [math]\text{H}^+[/math] ? Is it just like water a 'rest'? Same for this exercise: [math]\text{K}_2\text{Cr}_2\text{O}_7+\text…

Guys, I was looking at boiling point and melting points of the following and got this info from wikipedia. Gas / Boiling Point (oC) / Melting Point (oC) Nitrogen / -195.79 / -210 Oxygen /-182.95 / -218.79 Argon / -185.85 / -189.35 Carbon Dioxide / -78 / -57 What I don’t understand is, why is the melting point of CO2 is higher than the boiling point! Bit confused! Can you help?

lets say I have a powder of an enzyme which converts fatty acids into hydrogen peroxide. i fill a cup full of a concentrated solution of fatty acids and drop the enzyme into the cup. hydrogen peroxide is an oxidizer so im wondering if this could make an explosive (concentrated enzyme + concentrated fatty acid solution = fiery explosion?) Note: purely hypothetical guys, I'm wondering what enzymes are capable of

so in an attemot to get thorium metal out of a thorium nitrate solution. first i dipped a q tip in the thorium nitrate solution and rubbed that on zinc which turned black so i thought it was thorium metal that was forming. the reaction happened pretty fast so i know its not just the water reacting with the zinc. but now i have a cloudy substance and i have no clue what it is. it smells like bleach/chlorine/nitrogen oxides it did consume part of the zinc. any ideas as to what i have created? yea i know i should have asked this question first

Hey can any one give me some good information on making sodium hydroxide? ive spent the last 2 days stalking the web to only find sodium hypochlorite production, if any one has any info please feel free to share, thank you.

I've been searching and I haven't found it yet. I will really appreciate it if someone can help me. Thanks

It would be a lot of hassle getting the gas for a bunsen into my lab so would a spirit burner be a good substitute?

In this video we learn about basic principal of Electrolysis including distance effect, separator and neutral plate. we also introduce new concept of dry electrolysis cell created by Kusuma Ruslan the whole system of separated hydro-oxy generator Hydrogen & Oxygen test urls deleted

I was thinking about this today, and, lo, so was someone else at some point eventually: http://www.scientificamerican.com/article/chemical-bonds-inner-shell-electrons/ . Non-valence electron bonding seems like it could be a new frontier of chemistry. The paper the article is based on is calculations. So what experiments could be run to actually make it? High pressure has been suggested. Of course, there is probably not a single safe experiment

Why are some fuel sources better than other fuel sources? I mean some things are better fuel sources than other fuel sources.Some things burn easy and other things do not. Some fuel sources have more energy than other fuel sources.Where has other fuel sources have less energy example it hard to get car to run on water ,oxygen or helium and yet other fuel sources like wood or fossil fuels very easy and have lots more energy.

First, I apologize if this is in the wrong section. This might be considered engineering. I just assumed material science was chemistry. My main questions are about the material "metal foam". I'm curious about it's structure and physical properties. Seeing as metal foam is just a metal like copper/aluminum, with gas introduced to it while it's a liquid, does the final product still have the same structure as aluminum/copper? Like, would it be crystalline still? body center cubic? Would it still be metallic bonding? And how would you characterize something like this? Microscopy? There isn't really that much information on metal foam to assist me. I'm not su…

old gold buyers using many method to recycle old gold jewelry into pure 24 kt gold to resell i want to know a good cost effective method to recycle old gold jewelry.purify it into pure 24Kt small gold bars. one method i know is nitric acid method it costly and take long time

Hi, I'm a British national currently studying my BSc in Chemistry here in China. Although when I graduate it will be fairly easy for me to get a job doing business here, my passion is Chemistry and I wish to pursue a career in Chemistry. From what I have heard, career prospects back in the UK and elsewhere in Europe are pretty grim for Chemistry graduates. Is this true? I have heard that if you want a chance of a decent job then you need a Master or PhD.. I suppose that's reasonable if you want a career in research. If I were to go back to UK when I graduate, what are my chances of getting a job or paid internship in Chemistry for a year before starting my graduat…

Is there any method to measure H -D and O Isotope in a μm scale? I got some samples of fluid Intrusion inside of quartz . Their diameters are about 10 μm . Is that possible to measure the isotopes in such a little scale ? And who can do that ? Thanks a lot !

Apparently you cant mix red bull and milk. However you can mix ice cream with root-beer/coke/any soda and I have heard of people mixing soda(pepsi) with milk and drinking it. Apparently they also make chocolate milk Vodka. So why exactly cant you mix red bull and milk but you can do all these other combinations. I understand the process and that it make the milk clump and separates the protein but why does this not seem to apply in any other instance?

Hi, I have a few questions about the chemistry of the smoke produced from the burning of shisha tobacco in a hookah pipe: 1. Why is it that when milk is added to the water, the smoke appears thicker? What is the chemical process? 2. How does water act as a filter for 'bad' chemicals in the smoke? Is it effective? 3. What could be done to improve the filtration of harmful chemicals in the smoke? 4. How could an even thicker smoke than when milk is added be produced? Thanks, pyroglycerine

What process is involved in creation of iron oxide spheres in fly ash (residue from coal burning)? At what temperatures? Do microspheres get created which are reduced to elemental iron in any other process, and if so, at what temperatures can this happen? Thank you!

Hello, I'm an exchange student in Oslo and I need your help for my mandatory. My english is not very well, so I have problems understanding. And I never study crysstallography. Thanks for your help! Task 1 – Crystal structures, crystallography and chemical bonding CrAs (chromium arsenide) crystallises with MnP-type structure. MnP-type structure can be described as a deformed NiAs-type structure. CrAs has unit cell dimensions a = 5.549 Å, b = 3.461 Å, c = 6.208 Å, and is described with the space group Pnma. Relative atomic positions for CrAs are: Cr in 4c: (x, ¼, z), with x = 0.007 and z = 0.200 As in 4c: (x, ¼, z), with x = 0.200 and z = 0.577 In…

Hi, Can anyone provide me with some information or a link to some information about the legality of chemical experimentation outside of an official educational or scientific institution (ie in a lab at home) in the UK, Spain, and China? Mainly China. I'm doing my BSc Chemistry here and I would like to start doing some experiments at home. I know I have access to practically any chemical commercially or industrially available and the same goes for lab equipment. However, although I have access, I don't know if it's legal because nobody really follows the rules/laws here too much. Why do I care? Because even if its a million to one chance, if its illegal, I don't w…

Let's just say I don't believe the news. I'm throwing that out there. There are a few websites, such as about.com and scientificamerican.com that talk about how expensive it would be to engage in nuclear transmutation of bismuth into gold. That's nice. Supposedly, computers used to cost a lot back in the 1980s, a really top notch one. However, technology, theory, and methodology has improved. Now it's said that "It would cost more than one quadrillion dollar per ounce to produce gold by" the experiment that was used in the 1980s. Yeah, I have a hard time believing that. Actually, another issue is that no one ever seems to cite the journal articles or publicat…

Hi all sorry for my bad English. I want to write a program of computer modeling of chemical reactions. The program should calculate the interaction of nuclei and electrons , based on these calculations to simulate chemical reactions. This requires detailed information about in reality how chemical reactions occur from the point of view of quantum mechanics Please advise books dealing with questions or give a link to information or share something about this.

I'm try to make biodiesel..any substitutes for a separatory funnel. I dont want to spend $$...hard on cash right now.

I'm not too keen on my history of chemistry, so correct me where I'm wrong.. It seems all the major discoveries in chemistry happened in the 19th, and early to mid 20th century. (i.e. Avogardros number, molecular orbital theory, Grignard reagents, etc.). Im not update to date on the current discoveries made in the field of chemistry, but it seems as though all the big, fun discoveries are gone....are they? I get jealous of reading the physics threads. There's always some kind of new development about a new particle or a change in a theory. It looks like quantum physics is till a baby, and chemistry is an old geezer. I know every once in a while some chemist(s) receive…

Hello To avoid getting my bike saddle stollen, I had the idea of gluing a small ball of steel, in addition to securing the saddle post through a secure screw: But for when I need to remove the saddle, is there a way to "liquefy" the glue, through either a solvent or heat so I can remove the ball? Thank you.