Chemistry

The search engine came up empty so I thought I would post this great resource. http://www.inchem.org/

Element Abundance Hydrogen Helium Oxygen Neon Nitrogen Carbon Silicon Magnesium Iron Sulfur

An ionic substance like CuSO4, if I pour some pure water on it, it turns blue, my teacher explains this is that it is "hydrated", and what I am curious is how do the water molecules bond to the ions of Copper Sulphate??? For sure, not all the ionic compounds can be "hydrated"...., like table salt, it will not be hydrated, but dissolved.... so, how come Copper Sulphate dont dissolve??? Any help?? Albert

I am working on an experiment involving gasses and induced fluorescence. I am under the impression that it is possible to induce fluorescence in certain gasses within the visible spectrum by using an infrared laser or by other means in the non-visible spectrum. Is this correct? If so, with which gasses is this the case? In the little research that I have done about the topic, heavier noble gasses have been brought to my attention, such as Xenon and Argon. The object of my experiment is to produce a small (eventually around the size of a computer pixel, but for now a dot is sufficient) point of visible light in a closed container of gas using induced fluorescence. …

Where can I get the chemical, potassium nitrate? How expensive is it?

I test an experiment on Wednesday about melting ice. Would i did was put ice into a beaker and stick in it a data probe. i then added a salt eg. AlCl3. When I did this the temperature the data probe record suddenly went down by about 7degrees. However the ice melting extremely quickly. How can the salt make the temperture decrease but cause the ice to melt very quickly?

To make gas smell of something they used to contaminate it with onion skins. But now they use a chemical - what is that chemical? Thanks for any help

I have learnt something about pH value and wanna get some more of it. Anyone helps? 1.What does pH value refer to? a. Amount of hydronium ions ionized by the acid per mole b. Amount of hydronium ions ionized by the acid in the solution c.Concentration of hydronium ions ionized by the acid molecule. ( Total amount of H3O+ ions/Total amount of molecules) 2. Will the concentration of an acid affect its pH value? 3. Will the molarity of an acid affect its pH value? If not, why we need to measure the pH value of ethanic acid and hydrochloric acid by means of electricity in the SAME MOLARLITY?

I just learned about the European Union system for controlling the use of chemical substances, REACH. It seems like the industry, the pollutants, are to show that their substances are safe to use. I've done some Google-searches but I find the vast amount of information a bit overwhelming, so I turn to you, in hope that there is someone here who knows more about it. I would especially like to know how the industry can show that a substance is harmless, or safe. Is there, for example a prescribed testing procedure? For whom are the risks evaluated (The entire population, animails, wild life, plants etc.)? What authority is responsible for the actual approval? Thanks i…

I know HCl (aq) exists, because it is a solution that is called Hydrochloric acid but, what happened if I evaporate the water?? Will I get Hydrogen Chloride?? What does it look like and what kind of bonding it has?? thx Albert

Hi I'm new and this is my first post, so excuse me if this is a silly question. What holds neutrons and protons together?

I'm wondering if anybody here would know of any suppliers of Mercury either online or in the Southern California area. I've been searching for quite some time now and google has failed me. Any help would be really appreaciated. The real problem is that i need mercury in large quantities, i.e. 3 or 4 flasks (76lbs each) for now. Once again any help would be appreciated. Thanks alot.

Showing that both iron (III) and iron (II) ions in solution should react with zinc to give iron metal. Zn=>Zn2+ e Fe3+ +e=>Fe2+ + 2e=>Fe Instead only iron (II) irons are produced. 2Fe3+ +Zn==>Fe2+ + Zn2+ Apparently iron metal it is not made but why not? only 1 point question, has me stumpped. Help me with the half equations for the iron above please. thanks guys

Im in gr 9 chemistry and I was wondering if somebody could explain to me why Hydrogen does not collapse because of only one electron and no neutron?

I finally got a chance today to photograph my new 35 gram button of Iridium, and I'm just floored by the density of it. I have never held anything like this. It is simply incredible! I decided to take its picture next to a one ounce silver coin that I have. The Iridium ingot weighs 35 grams, and the silver coin probably weighs around 32 grams if you include the holder. The coin is only a tiny bit thinner than the button is, but not by much. (Maybe 1-2mm thinner). Anyway, just look at the difference in size! That is incredible. This is why I collect the elements. Hearing about how dense something is means nothing. Seeing and feeling for yourself the density of i…

Several questions related to alkalis. 1.Are all reactions between metal compounds and alkalis, and between metal compounds and acid displacement reactions? I think this is quite important as it helps very much to predict the product of these reactions. 2.Ammonia solution added into solution of metal salt always gives out ammonia? 3.Calcium hydroxide formed when sodium hydroxide added to a solution of calcium nitrates. Is the result(forming hydroxide) the same if calcium, magnesium are put in? Or even hydrogencarbonates of these metals. 4.adding excess ammonia can turn solution of hydroxide(precipitate) into some complex ions. Why the series do not follow the reactivi…

Which of the following solution has a stronger power to destroy things? A drop of solution with pH 1, A beaker of solution with pH 3. If both of them are put onto your skin, please think of the result after 2 days. Neglect evaporation.

i got a red gas. smelled bad. not a good thing if it's in your room. what could this be?

never got my head around balancing equations:mad:. is this right to start? Mg + HCl --> MgCl2 + H2 then attempt at balancing... Mg + 2HCl --> MgCl2 + H2

What do the brackets represent on the atomic masses on the periodic table? Whats the relationship between the elements 110 through 114 on the periodic table?

Yeah im 15 in Chem H. I went after school to fool around and i came up with this NaClO3 + H2SO4 --> ? I know its a redox and it produces some sort of Cl2 gas. Could it be like chlorine dioxide. But how would u balance it? All help would be appreciated.

can anyone provide a link to information about moissan's experiment? i know that he used a cooled platinum u-tube, KHF2, HF and iridium-platinum alloy electrolytes and that he did this in 1886, but i do not know the exact date and i also feel there are a few other things i could incorporate in a paper i am writing on fluorine. as a sort of prologue i intend to write a paragraph on the actual time and place of discovery of fluorine. i'll post the paper later when i finish

mods, dont hate me if this wasnt a good idea to post, but i thought it would be good to post a bunch of good sites to buy chems from. i've found that hobbyist sites are good, but some reagents of equal quality you can buy for much less at photography stores. pottery and ceramic sites aren't too bad either, but generally you can get similar items at photography stores if you happen to know of any other sites, list them below with some information about them if you wish. Pyro/Hobbyist Sites: http://www.unitednuclear.com ^high quality acs grade chems. rapidly growing so check every few weeks as they will probably have more chems. best thing about this site i…

Why do artificial environments need a certain range of pH like pools and aquariums? What chemical processes take place ? What type of reactions? Are there any problems with them? If so are there any solutions? Any safety concerns?

Hello. I was wondering, why is relaxation time used as the time-scale for radioisotopes tracers and not half-life instead? Cheers, DannyBoy