Chemistry

Sulphuric acid (H2SO4) has a dehydrating property, but what is the cause of this property? Can anyone explain? Is it about its structure? Thank you!

Hi there, new member I am. I've been working with refrigerants in code, and I've been learning a lot. Alas, I never did too well in chemistry. Refrigerants have standard naming conventions, like R-134a, which gives you exactly which and how-many of H, Cl, F, and C are present. You can also plug an oxygen atom in there by prefixing an E onto the number: R-E134. And you can turn any one of those into a halon by replacing one or more atoms with Br (like R-13B1, which is H-1301). Bromine is evil, of course, but that's not my problem. (Oh, you can also write dashes between digits to accommodate things with more than a single-digit's worth of atoms. Hence R-134a…

what are som relatively cheap, and environmentally safe reducing agents that could be used to reduce olefins /alkenes? Looking to reduce propene to propane

Is it possible to produce a lot of oxygen gas by using approachable chemicals at home? Please help! Also, I'm working on to make iron nail rust as fast as possible(for interest), besides putting into salt water and acid, is there any method possible using dry cells? Is it good to use steam(high temperature, presence of oxygen and water)? Thank you!

how is going? I want start to learn chemistry,where do you recommend to learn? sorry about my english

Hi Can you someone please explain why one particular electrolyte solution conducts electricity better than an another. Specifically NaCl and KI solutions? I understand the process of ionic conductivity but can't seem to get my head around why NaCl or KI will conduct electricity better?? Thanks for anyone's help, it is greatly appreciated!!

In terms of entropy, if a chemical reaction is endergonic, will the reactants always have more total molecules than the products? And if exergonic, will it be the opposite, and the reactants will have more total molecules than the products? Ex: 2C4H10 + 13O2 ---> 8CO2 + 10H2O Reactants: 15 total molecules Products: 18 total molecules Reaction is exergonic, because the product has more total molecules than the reactants. Ex 2: CuSO4 + 2NaOH ---> Cu(OH)2 + Na2SO4 Reactants: 3 total molecules Products: 2 total molecules Reaction is endergonic, because the product has less total molecules than the reactants.

Hi all, Bit of background, I'm currently self teaching some gcse level science. Messed around a lot at school and trying to repair some of those poor adolescent choices. Recently completed Maths (A) and English (B) I've now started studying Chem, Phys & Bio separately. My question is this: The chemistry work I'm doing shows that in any reaction no elements are destroyed they are simply rearranged into different states, I've got that side of things. I've also spent some time on catalysts and the part they play in the reaction. Now the Biology work I'm running through seems to brush over these laws and is more than happy to describe Oxygen as "used up" durin…

What are the common solvents to use for purification and extraction. What are the common temperatures for extraction and purification. Has anyone tried this to common tables such as vitamins and medication. I am a bored hobbyist wishing to learn self taught chemistry in a lab setting. I am hopping to carry some experiments that I have seen online in forums and you tube, first by initially learning to extract and purify chemical substances.

Hi Everyone, I have a question, I have a set of protein and a compound, and i pretend to study what is the best strategy for modelling the interaction between them ( protein and compound). Any suggestion? I though about some docking studies but i would like to hear for some extra opinions. Thanks, R.

Hello everyone, I'm really confused. Here is a equation CO2 + H20 <----> H2CO3 <-----> H+ +HCO3- * Now if I increase carbon dioxide I know both both Hydrogen and bicarbonate acid increases 1. Why does this make it more acidic. The thing is what I'm thinking is if a solution has an equal concentration of an acid and base it must be neutral. In this case both hydrogen and bicarbonate have increased in same amounts, shouldn't it be neutral 2. Why is it that in formula, PH is only determined by H+ concentration, Can't we find PH using OH- concentration. 3. The definition of base says it must produce OH ions in solution, bicarbonate is not …

I was writing up a bit on catalysts when a thought struck me, the reason metals are so good at catalysis is that the delocalised electrons make it pretty easy for chemicals to adsorb/desorb from the surface. an a sheet of graphene you have a similar set up with a plane of delocalised electrons. i haven't seen any papers on the catalytic properties of graphene so maybe i'm wrong. also, if i am right catalytic activity should be seen on carbon nanotubes and bucky balls as well.(and bucky balls would have excellent surface area/volume properties.

I once read long ago that the average human cell contains enough stored energy, that if it were released all at once, it would create a massive explosion. Could we estimate the amount of energy (thermal, sound, mechanical energy) released if every bond in a human cell were broken all at once?

Hello everyone, If there is a semi permeable membrane that allows only water to pass through. Also this membrane separates the sides into A and B. There are big molecules like colloids in side A along with water. Side B has only water . What mechanism causes side A to have more osmotic pressure, and thus allow water to flow from side B to A. 1) Is it because the particles are so big , that they physically reduce the interactions of water molecules in side A with the semi permeable membrane. 2) Is it because the colloid create a chemical interaction with water molecules and prevent them from moving away. I just want to know if this osmotic pressure created by a pur…

From the Wikipedia article on Chewing gum... "It is extremely difficult and expensive to remove once "walked in" and dried. Gum bonds strongly to asphalt and rubber shoe soles because they are all made from polymeric hydrocarbons. It also bonds strongly with concrete paving." So what exactly is this bonding between polymeric hydrocarbons? From my little general chemistry knowledge, I would guess a type of intermolecular force. A typical person would never guess the annoyingness of stuck gum would have anything to do with chemistry (then again, everything has something to do with chemistry). Just curious.

Why does the molar mass equals to the relative atomic mass of the element? I found that amazing when it's possible to know how many atoms are there in a certain amount of element. Can anyone explain in details? Thanks in advance.

Anyone know anything about the chemistry of these? http://www.canadianmanufacturing.com/design-engineering/news/re-chargable-sugar-based-battery-outperforms-lithium-ion-researchers-say-130456?utm_source=DNG&utm_medium=email&utm_campaign=DNG-EN01232014&e=8wq4zW4r20u4M20

hey there yall i wondering 2 things has any one here ever used chemicals to make low carbon steel gain a yellow patina similar to brass? ive done some research and they say ferros nitrate aka iron nitrate ( Fe(No3)3) will give me my desired affect..... does anyone know where in austin tx that i can go and purchase some when ever i want id like to give ot a try?

Would chemistry still exist, if their were no " man made" measuring devices? The image are " some" of the measuring tools I speak of. The point I am trying to comprehend is how chemistry is connected to " perimeters of geometry " see images." When I say connected, I mean how a substance is used with the science tool to carefully measure its volume, mass and etc.. With this said, how does this correlate with " balancing chemical equations." Would that be pointless with man made tools of measure then??? Or am I not getting something?

Why do chewing gum get stiff when we put water ( mainly cold ) on it ?

When do you believe ethanol will be the main fuel used instead of gasoline? Yes there are land issues, and its not as efficient, but when will it come to the point where either A) Pollution, Global Warming gets too much or B) We essentially "run out" of ethanol. I know this is mainly based on the consumer demand of ethanol as a fuel...so..when will PEOPLE, (i.e. consumers) want to start filling up with ethanol fuel? ~ee

Hi guys, do you know this product Sodium Lauryl Ether Sulfate ? what's the main role of this substance? TELL ME! THANKS!

Hi I'm not very good at chemistry, and i do not know where i should place this topic. Please relocate it if necessary. I would like to ask whether Bitsmuth trioxide (Bi2O3) will react with benzonic acid ? How will this reaction look like ? Thank you.

Hello everyone, I need a help about making the solution of Cobalt Chloride Hexahydrate. I already tried water and HCl but it did not work. I want it to be solved like sugar/salt in water. Which solvent is proper for this? I will use it in humidity desicators. In addition; I am also wondering that how can make paste/cream of it? Is it possible? I would be greatfull if anyone helps. Best Regards.

Hi all New to chemistry and needing some advice please. I am busy with a DIY project for my home pool analysis. I have assembled an RGB LED and a color sensor to read the color of water in a test tube ( using an Arduino board and LCD screen ). Firstly I am using this to better read the color of the DPD 1 tablet color in the water that gives me a better free chlorine reading. Very happy with the results so far. Next I am working on pH reading, and also want to add reading color for borates. This is the bit where I am stuck - the borates. Here's where I am at so far : I have created a 'known control solution' of 5000ml water, 44 g Borax power and 22ml hydrochloric aci…