Chemistry

I'm doing an experiment with aluminum wires, and when I put them in saltwater, they starting growing these orangish blobs. Then, in regular water, they looked darker in some parts. In air, obviously nothing happened. Can anyone explain what the heck happened with the wires in saltwater because I'm clueless right now? :confused::confused::confused::confused: Merged post follows: Consecutive posts mergedP.S. Could the salt have clumped together in the water to create those orange blobs? P.P.S. I used sea salt to make the saltwater solution, by the way.

Chemistry Exam The following is an actual question given on a University of Washington chemistry final exam: "Is Hell exothermic (gives off heat) or endothermic (absorbs heat)? Support your answer with a proof." Most of the students wrote proofs of their beliefs using Boyle's Law (gas cools off when it expands and heats up when it is compressed) or some variant. One student, however, wrote the following: "First, we need to know how the mass of Hell is changing in time. So, we need to know the rate that souls are moving into Hell and the rate they are leaving. I think that we can safely assume that once a soul gets to Hell, it will not leave. Therefo…

what are some factors that affect the voltage of electrolysis?

hi, im new here and can anyone of you tell me why nails react the way it does when it interacts with copper (II) chloride? thanks

Does anyone have any idea what these elements would have to do with 'pi'? Pi bonds, maybe? It's a riddle: http://www.thisisnottom.com/hamburg/woyzeck.php

Bulk purchase of CALCIUM ACETATE...approx. 1kg. Does anyone know of a Canadian or US source? This does NOT have to be pharmceutical grade...industrial grade is prefered. Ness

I have come to the cusp of my life where it is time for me to make some decisions about my future career. I really do love chemistry, its so interesting! I was wondering what field of chemistry I should go into. I have thought of biochemical research, plastics/compositites research, going into the oil industry (I don't know much about this one).... Could anyone recommend a field that they find interesting/there are decent paying jobs for? Its unfortunate that I have to ask this, but I would really like to be able to support a good sized family when I get older (3-4 kids + wife) and I will need a decent salary, especially depending on the cost of living in the a…

this isn't a question from homework -- really it is out of curiosity. why is the melting point of Al2O3 lower than the melting point of MgO? i did chance across this problem in a homework packet but was told to "ignore it for now" by my chem teacher because we would learn it later, but i am curious, and would like an answer now! thanks in advance. btw i have just finished learning about bonding in class. (HL chem)

Ok I am a sophomore in high school and we are working with a PH project. I have found enough information but I am kinda baffled at the formula and I cant ask the teacher for help. :-/ What would be the formula for measuring the PH (Acidity or basicity) of different solutes? And could you please explain it so somebody like me could understand it. xD I am terribly sorry if this is in the wrong section.

Question # 1 When a solution containing an unknown number of metal ions is treated with dilute HCl, no precipitate forms. The pH is adjusted to about 1, and H2S is bubbled through. Again no precipitate forms. The pH of the solution is then adjusted to about 8 and treated with (NH4)2S. This time a precipitate forms. The filtrate from this solution is not tested. Which groups of metal ions are either known to be present or cannot be excluded? A. Group III and Group IV B. Group III only C. Group II and Group IV D. Group IV only E. Group I and Group IV Question # 2 In the course of various qualitative analysis procedures, the following mixture is encountered:…

Hi If a pond of 2000 gallon of liquid had a ph of 10.6 .Approximately how much volume og sulfuric acid will get the ph down to 9. I have no other information regarding the pond. all help is greatly appreciated. Karthik

solubility of chloroform in water is 0.8gr in 100ml water at the temp of 20C. Does anyone know what is its solubility at 6C or any temp around? Thanks, Lobat

I was reading the book "General Chemistry" by Linus Pauling and i stumbled upon a confusing part where it explains the IS units of coulomb. The book explained Coulomb; "The coulomb is one-ampere second, and the ampere is defined as the current in each of two infinitely long parallel wires 1 meter apart that causes an electromagnetic force of 2 x 10^-7 newton per meter of its length to act on each wire." as quoted from the book. This definition i did not just get from the book, i searched up online and the other sources also said infinitely long parallel lines. I am confused at the "infinitely" long parallel wire part. What is this infinitely long parallel wire?…

Greetings. Yesterday I performed a lab expIeriment in physical chemistry to determine the partial molar volumes for mixtures of water and acetone. I think I'm beginning to wrap my head around the theory, but there is one thing which I'm having a bit of trouble with. In the lab notes, a formula for the molar quantity of each component in a given mixture was given, along with the task to prove it. I'm having a hard time doing that, also I suspect I might be suffering from some basic misunderstanding about what exactly is meant by some of the variables (the lab notes can be somewhat unclear on defining them, IMHO). The formula given for a two-component system is: …

Hi there If I have a liquid that contains yeast and i boil it, does anyone know what temperature the yeast will die? Also can i use a microscope to measure the size of the yeast? As i may filter the liquid afterwards to remove the husks. Thanks Bob

hye ! one of my friend asked me about arrangement of orbitals in an atom i.e how 1s, 2s, 2p, 3s, 3p, 3d............... orbitals spaced in an atom ? please suggest me the app. ans . thanks

Hi, I'm trying to make a H2 generator for *part* of a science fair project. I've got 6 Stainless Steel outlet covers from Lowes (I don't know what grade, I've heard that 316 is the best) that I have wired up. I alternate positive and negative plates. (no neutral) I'm using distilled water with some sea salt as an electrolyte. (I don't know if sea salt is any different than table salt for this experiment, the only difference should be the presence of iodine...?) I've also got a boat/RV battery charger that is putting out 12 VDC and 12 Amps. (I've noticed the amps go up if I use more salt, I'm not purposefully putting in more, but should I try to put in less?) Here is m…

Hello, lately I have been facing some trouble with a question that I have been asked in one of my labs. I cannot determine what reaction would occurs if zinc and copper and put into hydrochloric acid. Can someone please explain to me in detail how and what reaction would be reacted. Thank You

Ok, a bit of fun and also information; "What's the story behind Schrödinger's Cat?" Please share!

i always wanted some exiting softwares for chemical use. why dont u all post links to some of the best softwares that can be used by students etc of various field in chemistry.

the glassware that consists of a glass tube connected to a frit, through which you can bubble gases in lots and lots of tiny bubbles. A bit like the bubbler you get for fishtanks?

Hi all, I am as far away from a chemist as humanly possible; I much rather physics than chemistry any day, and I don't really undersatnd much of chemistry usually enough to do something practical with it. BUT I recently baught a book called "Sneaky Uses for everyday things", and it has a section about household organic chemistry. One of the "tricks" it proposes, for instance, is creating a plastic-like material by heating up milk and adding vinegar to it. According to the book, the vinegar is creating chunks of solid matter called "Caseine" and you can just mold it to whatever u want, let it dry for a while, and have your own version of home made plastic. …

Hi all! I am searching for a traineeship in chemistry in an English-speaking country or in a lab where english is the main language. I am actually in the 2nd year of a trainee for a chemistry assistant. I did simple syntheses and some analytical stuff, also other things. Any ideas where I could apply? Or if there are any institutions which can handle such requests, because I need also a place where to sleep then. greetings

i've heard monomers described as, "simple organic compounds which can link with other compounds to form polymers" Q. are monomers always organic? and does organic always mean containing carbon? Q. who simple does a molecule/compound have to be to be labelled 'simple'? Q. how large/complex does one have to be to be called a macromolecule?

Okay, couldn't find anything on this using the search engine. I am interested in making a small amount of pyrophoric material. I was going to use this method: "An artificial product, which takes fire upon exposure to the air, and hence called air-tinder. It is prepared from alum by the addition of various inflammable substances. The simplest mode of preparing it is to mix three parts of alum with one of wheat flour, and calcine them in a phial or mattrass, until the blue flame disappears, then keep it in the same phial till cold, well stopped with a good cork. In this powder be exposed to the atmosphere, the sulphuret attracts moisture from the air, and generates sufficie…