Chemistry
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Chemistry with inorganic compounds.
- 1k posts
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All chemistry involving organic compounds (those with C-H bonds).
- 882 posts
2900 topics in this forum
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I am wanting to write a chemistry book with a little fictional spinoff. It will be a story about a person as small as a proton and with a pencil as small as a quark(which is about 1/3 the size of a proton) discovering things in chemistry. Okay maybe the pencil is smaller than a quark 1/3 the size of a proton. Hmm Come to think of it up quarks are much less than 1/3 of a proton so maybe it is the size of an up quark. The person even discovers oxygen chains that are similar to alkanes(single bond carbon chains). He decides that these oxygen chains should be called oxanes and oxygen rings called cyclooxanes. It is inorganic(no carbon) so he puts the ox before the ane to show…
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- 5 replies
- 2.1k views
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While reading about capillary action in my chemistry textbook, I learned about what causes a convex and a concave meniscus. To my understanding, a concave meniscus forms when the adhesive force between the solution and the capillary is larger than between the solution molecules themselves e.g. between water and a glass capillary. A convex meniscus forms when the cohesive forces of the solution is larger than the adhesive forces between the solution and the capillary e.g. between mercury and the glass capillary tube. My question is why is water so strongly attracted to glass then between itself?
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- 7.2k views
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I'm considering psaaing sulfur dioxide through pvc piping under pressure in order to make sulfuric acid. Does sulfur dioxide react with the make-up of pvc piping?
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- 7 replies
- 7.2k views
- 1 follower
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What do the VSEPR rules say for something with 7 electron clouds around central atom? Would the central atom have to be an alkali metal or a transition metal ion?
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- 1 reply
- 1.6k views
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I suspect this is more of a physics question, but I don't really know why a solution of a copper ion looks blue. Does anyone know a good book (academic or thorough) or website that really goes into this kind of stuff?
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Reputation Points
- 15 replies
- 3.4k views
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Why can't H4O2+ be formed ? H2O has 2 pair it can form a dative bond to form H3O+ why then the second pair form another dative bond ?
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Reputation Points
- 7 replies
- 1.7k views
- 1 follower
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If it could be synthesized would it have any use?
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- 1 reply
- 1.2k views
- 1 follower
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1) Na2S (aq) + Fe(NO3)2 (aq) ---> FeS (s) + 2 Na(NO3) (aq) Ksp = [Fe2+][s2-] Can someone explain why? 2) What is the Ksp for the salt Pb(IO3)2 if its solubility is 5.0 x 10-5 M? Answer is supposed to be 5.0x10-13. I also don't understand this.
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Entropy is the idea that everything goes towards chaos and if everything goes towards chaos then wouldn't everything be the same. If we look at a room, if you don't clean you room for a while, hence put in energy to clean it, your room will keep getting messier. The messier it gets the more consistent it becomes, more and more of it will begin to look the same. (By same I mean in a context of garbage being there on the left side and right side of the room even though its not the same garbage, its garbage.) So my question is in the universe why are there so many separations an example being the existence of a vacuum where there is hardly anything to planets which are just …
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Now I'm not actually equating chemistry to alchemy, but I am equating their existence/ legacy through history. Alchemy, understood in today's time is an old pseudo-science philosophy of transmuting one element into another, etc...not going into detail, you get the idea. With the emergence of inventions and discoveries such as the God particle, quantum mechanics, 3D printing, holograms, powerful supercomputers, etc; will chemistry in 50-100 years be equivalent to the myth and legends of alchemy today? Will people who synthesize acetone in their garage be seen as practicing an out-dated, useless, mythical ritual that has no equivalence or purpose to the science of the f…
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- 11 replies
- 2.3k views
- 1 follower
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Food additives are to improve the quality of food color, aroma, and taste and so on, and put into food for the needs of the preservation and processing of the compounds or natural substances. Definition of food additives is not the same in countries around the world, the United Nations food and agriculture organization (FAO) and the world health organization (WHO) joint committee on food additives food regulations are defined as food additive is consciously general with a small amount added to the food, to improve the appearance and flavor of food and organizational structure or the nature of the storage of nutrients. Is There Anything Else?
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- 5.9k views
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I am so confused on a organic nomenclature question. I thought I was getting the hang of it but clearly not... if anyone can shed some guidance I would be much appreciated.
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- 3 replies
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- 1 follower
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I want to know if a 0.02%TWEEN80 solution in PBS buffer will still be homogeneous if I will dilute it with 50% acetonitrile thanks
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- 1.1k views
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What are the differentiating characteristics between white glue and yellow glue (properties, scent, chemcial or other reactions) when: i. exposed to heat and humid over time ii. dried or hardened over time iii. used on paper/cardboard, sponge, rubber and fabric Does their scent get trapped relatively more easily in fabric and sponge? Which glue's scent get trapped more?
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- 2 replies
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- 1 follower
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Hello! Heavy water according to wikipedia is causing death of rats in a week of drinking. http://en.wikipedia.org/wiki/Heavy_water The only difference from water is replacement of Hydrogen element by Deuterium, D2O or HDO. Just because of extra neutrons properties such as boiling point, and melting point are slightly different (not to mention other hidden properties hard to measure). D2O (Heavy water) Freezing point (°C) 3.82 Boiling point (°C) 101.4 HDO (Semiheavy water) Freezing point (°C) 0.0 Boiling point (°C) 100.7 H2O (Light water) Freezing point (°C) 0.0 Boiling point (°C) 100.0 This example shows that it's important to examine the all c…
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- 9 replies
- 3.2k views
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Hi, everyone Do you know the difference between stpp (Sodium-Tri-Polyphosphate) and shmp (Sodium hexametaphosphate) and what are the similarities between them?
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- 4 replies
- 3.4k views
- 1 follower
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Hi, guys, do you know which forums are related to food or food additive? If you know please tell me. Thanks in advance.
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- 1k views
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Is it possible to combine calcium sulfite with witherite to form lime and barium sulphite? CaSO3+BaCO3 → CaCO3+BaSO3 Thank you!
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- 1.4k views
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I have a Block Co-Polymer that is a type of fiber with an FTIR spectrum very similar to hair. I need to some how break down a fiber, and synthesize it. If I could, which I can't, this could mean simply melting it and pouring the molten fiber into a mold. What are some methods that you can suggest I try? I feel that dialysis could be a option (spin in tubing, against acid or acetate based solution in hopes that something permeates through). I need to choose this route as opposed to artificial synthesizing because the material I'm looking at is incredibly complex to the point where mixing and chaining peptides would be very expensive (no one has successfully taken…
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- 2 replies
- 1.7k views
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my objective is to create pure silver nanoparticles smaller than 10 nm is this possible with electrolysis ? ive heard AC electrolysis in not possble but my experiments keep bringimg me back to AC is there an AC process thats viable..thank for your comments
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Reputation Points
- 1 reply
- 1.7k views
- 1 follower
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im doing ac htgh voltage 10,000 volt process with crystalline silver silver crystals Ag, 99.98 pure and distilled water . objective to obtain pure silver nanoparticles 0.2 to 0.3 nm . 1 gallon of non conductive distilled water TDS reading 0.00 ppm ,25 grams of crystalline silver there is no + or - leads only 2 red pos leads because of alternating current first lead placed in solution with silver second lead placed six inches away from and 1/4 inch above solution connected to a one inch piece of silver whtch a constant purple arc makes contact to surface of solution. heres first question ive heard that nitrogen can be infused thru the arc which may cause the react…
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Reputation Points
- 11 replies
- 3.2k views
- 2 followers
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A simple experiment is proposed below: The ,,positive” electrode is formed by a Cu piece inserted into a glass of water (or a CuSO4 solution). The ,,negative” electrode is formed by a Zn piece inserted into water or into an acid solution (vinegar, citric or sulfuric acid). Vinegar and citric acid are commonly used in food preparation so it is not a big deal to find them. For a more spectacular visual effect, a solution of sulfuric acid, 3 up to 5M can be used in Zn electrode chamber. Common tap water can be used. Of course for more elaborated experiments or for the skeptics deionised water is necessary; for home experiments this can be bought from a car shop. As salt…
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- 4 replies
- 1.7k views
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According to Le Chatelier's Principle Increasing the conc. of a reactant shifts the reaction in forward direction to re establish the equilibrium.Now if one of the reactant is solid and let the reaction be: A(s)+B(g)------->C(g)+D(g) In such a case if we apply the equilibrium constant equation in which conc. of a solid reactant at equilibrium is taken as 1,then according to this increasing to decreasing the conc. of solid will have no effect on equilibrium so there should not be any shift in the reaction Why rule should be applied in such a case ? Thanks In advance
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Reputation Points
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- 1.7k views
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Law of mass action have 2 parts-equilibrium part & reaction rate part The reaction rate part states that rate of a reaction is directly proportional to the product of active masses of the reactants with each reactant term raised to it's stoichiometric coefficient. The rate law states that rate of a reaction is directly proportional to the product of active masses of the reactants with each reactant term raised to some power which may or may not be equal to stoichiometric coefficient of the reactant. Why the two laws are different when we talk about power to which active masses of reactants are raised ? Which law is correct ?
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Reputation Points
- 2 replies
- 3.4k views
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I'd like to start off by saying I'm new here, since this is my first post and I didn't notice an introduction section. In my first semester Gen Chem class we started to discuss covalent bonds, reviewed Lewis dot structures, and learned to draw VSEPR sketches. I immediately noticed that there was an inadequacy in what we have been taught up to now when I began coming across interhalogens and other molecules that boldly broke the octet rule. She (my professor) said we would get into more complex models, but they too would have issues. I read ahead in our text book and have a rudimentary (at best) understanding of valence bond theory and molecular orbital theory. But th…
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- 1 reply
- 957 views
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