Chemistry

Is there a way that you can make something out of house hold stuff (or cheep stuff) to make and collect o2?

Hi everyone, I'm just wondering about ionic bonding, for eg aluminium oxide. Oxygen has 4 electrons on the outer shell whereas aluminium has 3. So the oxygen atom could gain 2 from aluminium to fill their outer shell, but aluminium would still have one electron on it's outer shell. So what would happen to this? Would it remain with the aluminium? ta!

Hi everyone, I've just got a few simple questions regarding covalent & ionic bonding....I hope you don't mind! re: ionic bonding. I've read that if sodium metal (therefore neutral sodium atoms) reacts with water, it will result in sodium + ions by getting rid of it's electron on the outside shell. But where would that electron go? The hydrogen and oxygen are already convalently bonded so they have no need to acquire that extra electron to fill up their outer shells. Or would the sodium stimulate the oxygen and hydrogen to break up and create new molecules from sodium, oxygen & hydrogen? re: covalent bonding. If graphite is composed of carbon atoms…

Balancing equations! I found this on the internet, and i need it for my assignment. Is it correct? It's the egg + vinegar experiment. CaCO3 + 2 CH3CO2H ----> CO2 + H2O + Ca + 2CH3CO2 I also need to know what "CH3CO2" is? Thanks!

Heyy there! I have a question about the Modern Periodic Table... All noble gases, as we know, are placed in group 0, and it is also known that the atomic radii of elements decreases as we move from right to left across a period. This is due to the nuclear attraction and the electronegativity of the elements. But since noble gases dont have nuclear attraction, surely their atomic radii must be bigger than the element before it! It was also stated that the noble gases have larger radii than the rest of the elements in the period....is that true in all periods?? I had got a question asking me to state the element with the largest atomic radii in period 2, so I wrote '…

What is an acceptable procedure to use SO3 to make Sulfuric Acid? What proportions would result in reasonably concentrated acid? imp

Its been a very, very long time since the last time I was balancing chemical equations so I figured someone with it much more fresh in their minds would be able to help me. My situation is this, I am attempting to use two seperate alloys in direct contact with eachother and passing a high current through them, and was wondering if there would be any adverse side effects to it being in the rain and such (electorlysis build up on one side, and decomp of the other.... dont want that). the two alloys are Copper-Magnesium, and Copper-Cadmium. 600V DC current will be running through it with a maximum amperage of 4000A, and will be directly exposed to the elements indefi…

http://cgi.ebay.com/Selling-Entire-Elements-Collection-67-pure-samples_W0QQitemZ120125758835QQihZ002QQcategoryZ413QQrdZ1QQcmdZViewItem i shall miss ye, sniff sniff ras

One answer to the problem of storing and transporting hydrogen: aluminum and water, with a little gallium thrown into the mix. Auminum oxidizes and releases the hydrogen from the water, and the gallium ensures the reaction can continue. http://news.uns.purdue.edu/x/2007a/070515WoodallHydrogen.html

Here are a few questions puzzling me for a long period of time. 1. If reactant X is converted to product Z through a intermediate Y. Then, it is unfair to compare the rate constant of (y to z and x to y) just on the basis of the activation energy for the steps, right? arrhenius equation : k=A *exp(Ea/RT) What does A mean and under what circumstances does it change. 2. Recently, my class took a laboratory experiment but I am not sure about the validity of theorem behind. In the experiment, four different set-ups with the concentration of the propanone solution as the sole variable factor are used. At fixed time interval, the concentration of the remaining iodine co…

Is the rate constant in the rate equation equivalent to that in the arrhenius equation? Does the arrhenius equation describe the overall rate of reaction or can be interpreted to compute the rate of forward reaction and backward reaction respectively? If it could be employed to deal with both sides separately, then I know why the decay of radioactive substance has a constant half-life, otherwise, it still seems to be an enigma to me though after exhausting search in the web. Please help

I'm looking for a site that has all chemical reactions categorized by functional group. I found this two sites: http://www.chem.uic.edu/web1/OCOL-II/WIN/RXN.HTM http://www.cem.msu.edu/~reusch/VirtualText/functbl.htm ... but I think the list is incomplete. correct me if I'm wrong.

One of my suppliers does not offer Formaldehyde, or Formalin, but only Paraformaldehyde. As I understand it, perhaps not quite correctly, paraformaldehyde is an isomer in powdered form. My question specifically is, if gentle heating liberates formaldehyde gas, can someone tell me whether volume/pressures obtained are adequate to bubble the gas through water to obtain formaldehyde solution? Can 37% be achieved. Or, is some other scheme possible to utilize paraformaldehyde. My mother-in-law is coming to visit soon! Imp.

Would anyone be able to tell me how transparent sunscreen is manufactured? I know how it works and why it is better than normal conventional sunscreen (ie. as nanomodified sunscreen contains only 2% w/w ZnO there is a greater surface area to volume ratio and hence the ZnO acts as a better UV filter). But exactly HOW is it manufactured?

Ok so I have a chemistry cosmetics assignment and I have to analyse two ingredients in my shampoo. I picked Sodium Laureth Sulfate (a foaming agent) and Sodium Chloride ( a thickener) So I have a description of the properties it is used for eg. It is cheap effective foamer. But now I need to have an explanation for the presence of these properties (Based on the types of bonds, electronegativites etc.) I have no I dea about why they have these properties so if sokmeone could please give some info that would be great.

All my classical chem. texts say, in essence, pure water has a Ph of 7.0. Also, pure water may be obtained by distillation. My book on building a live steam locomotive, under boiler care, claims distilled water has a Ph of about 5.5! (??). That's what started my wheels turning. I bought steam distilled water from 3 different sources; all checked out acidic, one as low as 5.0. That's low enough to corrode my boiler tubes! Obviously, the Ph is easily adjusted upward, probably with baking soda. However, can someone come up with an explanation whether the texts are wrong, or something funny is going on with the distilled water? (Textbooks CAN be wrong. My calculus…

On an atomic level, what happens to atoms when they form bonds to cause them to release energy?

does anyone know how to find the concentration of solutions when your given two volumes and two Molalities. like 200 mL of a .3Msolution of HNO3 and 500mL of a .4M solution of HNO3 are mixed together. what is the concentration of the resulting solution. im so lost:-(

Hi I am Andrews, I want to know about some database relating to chemistry in Internet and where I can find polymer chemistry information? If any one knows about this database reply me Thanks in advance

No, despite the title, this isn't a kewl post Last friday, at the local highschool where I live, a less than intelligent high school senior decided to make an infamous chlorine bomb, and leave it in the boy's bathroom. A teacher came in, saw an OPEN bottle and a horrible smell, picked it up (it was hot) and WOOSH, was engulfed in nasty fumes. He was taken to the hospital and treated. The suspect was apprehended by the police and it was found that he had mixed alcohol and chlorine pellets. My question is this: Why was there a big and sudden expulsion of gases when the container was picked up. Is it shock sensitive? and how does the reaction pr…

Hey Guys, I'm kinda new to chemistry, so excuse me if my questions sound really easy.. I need some help on Lewis Electron Dot Diagrams. How do you do them? They are apparently in my Chem exam next week, so any help would be greatly appreciated! Thanxx

So I just recently started properly reading and studying into the science subjects, and up now is Chemistry. I am using Zumdahl's book as my crutch. I am somewhat confused on the issue of limiting reagents (under Stoichiometry) and was wondering if anyone could make it clearer. I googled it, and sites like Wikipedia made me somehow more confused. http://en.wikipedia.org/wiki/Limiting_reagent In the first example, why does it feel to me like a given was missing? And in the second example, where did we get the 157.9g from? Much thanks for the help.

Hi, how your prepare solutions in a laboratory. For example if you have to prepare let say 1.5 mol/dm3 of hydrogen peroxide (H2O2). Any help will be most appreciated!

There are a few questions in this. I have been told that you can turn a copper statue blue by pouring sulfuric acid on it, because copper sulfate is made. And I was just thinking, would the statue be copper metal or would it be, at least coated with, copper oxide? The other thing I wanted to know was, if this was done to the statue (turning it blue) can the copper sulfate be changed back to copper by just rubbing zinc onto it? Or would there be a better method to do this? And, would this whole process really damage the statue in terms of shape and would it be weakened by doing this?

Does anyone know of a site that lists the "standard" colour codes used to represent atoms of certain elements in structural models? For example, some common ones I know are: Hydrogen: White Nitrogen: Blue Oxygen: Red Carbon: Black I know colour codes vary, but is there a commonly used colour to represent silicon?