Chemistry

As part of a more integrated way to learn Chemistry outside of the classroom, I have started reading several books dealing with different parts of Chemistry. I have just finished reading: The Periodic Kingdom By: P.W. Atkins It was a great read that helped me understand exactly how intricately interconnected the elements of the periodic table are. It reinforced the information I have learned behind electron shells (the topic we are currently studying in my chemistry class). I have just started reading: The Periodic Table By: Primo Levi Thus far, I can't say I know enough about the book to give an opinion. This book doesn't deal with Chemistry specifica…

Hello, It is long time since I have learned chemistry. My book says many drugs are strong acids or weak bases. Furthermore a strong acid in an acidic media is more lipid soluble and can cross cell membrane. This I can understand. HA <---> A- + H+ So with a strong acid HA is lower and A- is higher at equilibrium. If I suddenly increase H+ ions, then HA would further increase which is more lipid soluble and cross cell membrane. Now the book says weak bases are ionised and more soluble in acidic media. Ok if I use the same reaction for that, HA <---> A- + H+ So with a weak base HA is higher and H+ is lower. Then if I suddenly increase …

Hi guys I have a grade 12 highschool lab tomorrow and i dont understand one of the questions The question is as follows: The balanced chemical equation for the reaction is as follows: 2KMnO4+ 5H2C2O4+ 3H2SO4 ----> K2SO4+ 2MnSO4 + 8H2O+ 10CO2 Account for the different rate when the second portion of potassium permanganate solution was added to test tube #1. (Look at the products carefully for a clue). (Test tube 1 is a repeated version of another test tube experiment which consisted of 5 ml of oxalic acid, 10 ml of sulphuric acid 10 ml of tap water, room temperature and 2 ml of KMnO4. The difference between both is that the repeated version took 74s to react a…

Can anyone please answer my question it is just a quick question for my lab paper and i need to turn this paper in at 5 so please help me the question is "Does a measurement affect the mass or the volume? I am doing a science experiment and one of the steps is put 135 ml of this liquid. Does that measurement affect the mass and volume of that substance?"

why secondary standard solution are used for standardisation ?

Hi all, I have been working on adapting Dscript for representing molecules. It works great because Dscript is already designed for vertical and horizontal. I just started it, so the online info for chemical notation is far from complete. I use the Dscript alphabet (reference at www.dscript.ca). So far it seems really efficient. It works great for amino acids and peptides. Dscript Chem Notation - www.dscript.ca/lesson I would love some advice on how I could make it more efficient and aesthetically pleasing. here are some example. Morphiceptin Proline, Phenylalanine, Proline, Tyrosine, and far right is the product, Morphiceptin. …

Hello everyone, My name is Yuval, and I would like to tell you about a Chemistry course I'm making with some help from a friend of mine, Chris. The course is named "Basics of Chemistry", and requires no previous knowledge in Chemistry whatsoever. Even though I'm sure all of you, or at least 99% of you already know the basics of Chemistry, and most likely know it better than I do, I would like you to take a look at this video: Also, a little request to help funding the videos: If you have AdBlocker or anything else which blocks advertisements, please turn it off while watching the video, and when you reach a point when a little ad pops up, like in th…

plzz am looking for any of this books, thanks in advance Cotton, Frank A. Chemical Applications of Group Theory. 3rd ed. New York, NY: John Wiley & Sons, Inc., 1990. ISBN: 9780471510949. Recommended Albright, Thomas A., Jeremy K. Burdett, and Myung-Hwan Whangbo. Orbital Interactions in Chemistry. New York, NY: John Wiley & Sons, 1985. ISBN: 9780471873938. Harris, Daniel C., and Michael D. Bertolucci. Symmetry and Spectroscopy: An Introduction to Vibrational and Electronic Spectroscopy. New York, NY: Dover Publications, 1989. ISBN: 9780486661445. Tsukerblat, Boris S. Group Theory in Chemistry and Spectroscopy: A Simple Guide to Advanced Usage. New …

As I have some organic chemistry knowledge, I've become interested in the synthesis of a variety of chemical compounds, primarily because I'm interested in their usage to observed behavioral outputs from deliberate input of a drug into an animal system (aka I want to make drugs for experimental purposes). However, I do not readily have the resources to buy an infrared spectroscopy machine. I suspect it would not be too difficult to setup some kind of thin-layer chromatography setup to analyze whether or not I have obtained the particular substance I am interested in. However, even then, I would be unsure about the results unless I had an IR and some kind of way of analyzi…

if you added water and then let plaster of paris set, then immersed it in sodium carbonate solution, would it convert to calcium carbonate? if so, would the CaCO3 be on the surface, all the way through, or in small particles in suspension? *the set plaster of paris being hydrated calcium sulfate of course

to analyse the ethanoic acid present in vinegar,i used potassium hydrogen phthalate to standardise the sodium hydroxide (my secondary standard ) why the primary standard in this practical is not suitable for standardising a solution of ammonia ?

anyone know any good books on general chemistry.

I just have a question about counting the number of atoms in a hydrate. I know that it is very simple, however, I forget! So, for example, take MgSO4*7H2O. I know that there are 1Mg, 1S, 11 O's, and 14H's, however, when you add a 2 in front of the formula like this: 2MgSO4*7H2O... how many of each are there?? I think there are 2Mg's, 2S's, 15 O's, and 14 H's... Is this correct? Thank you!!

Hi, How does paint protect steel from rusting? I was thinking that the paint cover physically prevents water from contacting steel. Hovewer, I noticed (on my car, unfortunately) paint bubles indicating rust below them. But the paint cover is still undamaged and I don't know how can rust form below seemingly healthy paint. Could be that paint is not the perfect cover. Probably not. It is only slowing down the rusting process... What confuses me is that painted steel can do good for years (without rust signs), but once it starts rusting it seems that the paint doesn't slow the process any more. Why?

Does aplying oils on rusty metal witout 1st cleaning off the surface rust still prevents furthur rusting as long as the oil is there, or rusting can still continue inside? Is there liquid or something that can wipe off rusts like magic

OK I'm going to try to put this question the best way I can. But as far as I understand it, an atom will emit a photon when a photon of just the right energy is absorbed, thereby raising an electron from a lower energy state to a higher energy state. More specifically, the photon is emitted when the electron drops down an energy level from it's new excited state, to a lower energy level. From say n=4 to n=2 for example. But my question is what causes the electron to drop an energy level and thereby emit the photon? An example of this might be hydrogen whereby the electron dropping from the n=4 to the n=2 level results is a blue spectral line. However if just the right fre…

There is a scientific title for the principle, in chemistry, that the more of a substance one adds to any given volume, the less it influences the volume statically as the saturation point increases. A good example is the addition of CO2 into the atmosphere. At a certain point, 1a amount will result in say 1b change in the equation. But double the amount to 2a, and the result will not be 2b, but something less. Keep adding CO2, and the effect will continue to decrease to the point where any further addition will result in no noticeable change. What is the name of this process? I just cannot remember it, sorry. And thanks. John

Hey everyone! I want to buy some chemicals, but I can't find a good supplier. Where should I go?

in the experiment in which sodium alginate is dripped into calcium chloride solution to create little beads, if you leave the beads in the solution for long enough, will they solidify all the way through, or will they stay liquid in the centre?

I am working on a project that is requiring me to find a material, chemical or basically anything that sticks to wood extremly well. If anyone knows of anything It would be much appreciated. peace and love - OneWithEnki

Is NH3 a Arrhenius base? I don't know whether a Arrhenius base requires a OH- in the molecule.

Is it legal to simplify a->b->c as a->c a <=> b <=> c as a <=> c ?

If I put Iron in water, will it make hydrogen gas? Since rust is oxide, does it remove the O in water, leaving H2? I want hydrogen for my element collection! PS Call me dumb, I don't care. I just want an answer.

Who is the world's top chemist and why ?

Why is NH4Cl(aq) acidic and CH3COOHNa(aq) basic?