Inorganic Chemistry

Simple testing for the presence of carbon I tried to edit the title, but could not figure out how, so I changed it just above. -------------------------- Hello, I'm in high school and I have a science project, I must test for carbon without testing gas emissions using the following materials/scenario. 1.) Take the center carbon rod from a heavy duty battery and scrape some of the powder off/or use the rod directly. Assignment Create a chemical test and/or process to test the rod/powder for the presence of carbon without using gas emissions as indication of carbon: Example of the test exception: "I can't just burn it in oxygen and test the gas for CO2, bec…

can anyone help me out a little, I was breaking up some Ammonium nitrate with a cheap fork as it was starting to go solid, some of it stuck to the fork and after a while the crystals on it turned deep blue (proving copper). I`ve mixed in a test tube a strong soln of the AN and put in some copper wire, there was a slight smell of ammonia at 1`st until the soln started to turn blue, now it looks like ink and the copper metal is evolving gas, slightly reminiscent of Nitric acid in smell. can someone explain to me what the reaction is? some places say it will make copper nitrate if heated and the ammonia is allowed to evaporate (there`s no ammonia smell though?) oth…

People, I always figured that the 2 methods for purifying water were about the same when comparing the end result- 2 means to the same end product. I know DI can get down to 18 megaohms resistivity at the service point, and after even a few minutes, it jumps to say, 0.2-0.5 u Mhos conductivity, which is still pretty clean water. Someone is now telling me distilled is what I need because DI is too "corrosive". Distilled may be 1-10 micromhos of resistivity, where di is usually less than 0.5 or so. Anyone have experience in this arena?

I would like to see what are the opinions on alchemy in science, whether you think it is good or bad. By alchemy, I mean the alteration of the number of protons to change one atom into another element. I do NOT mean taking a rock and making it into gold, this is not the definition of alchemy. This was what alchemy was in the medieval ages, as that was the time where gold was really valuable and making it from a rock was considered magical and turned the common understanding of the word alchemy, into making gold from rocks, which is not what it really is. So, therefore, don't post anything on "making gold" as that is not what I am talking about. If you want more infor…

I've been interested in making Electrorheological Fluid for a while now and have made several calculations and theories about how to make it and how to apply it. I came here to check my calculations with people who are more knowledgeable than me in this area. I'll update this post when I have gathered them together. P.S I'm only 14 so please excuse me for any mistakes or me being a bit uneducated in certain areas

Hello all. Can some one expain me please how this double bonds are formed?

I'm new here. Hello I thought I got the idea of Graphite structure, but when I'm reading it again now I don't understand why the electron from each C can freely move(vertically?) between the two layers, forming the linked sheets of graphenes? And why is there the Van der waals bonding (vertically?)between the layers? Is it caused by the freely-moving electron? http://batteryblog.ca/wp-content/upl...6/graphite.gif Thank you so much

Ok, I'm trying to figure out the volume of one mole of HCl in muriatic acid, but I don't know how they measure the HCl content. The bottle says 31.45% HCl, but what is this in relation to? Does this mean that 31.45% of the mass of the muriatic acid is HCl, or that 31.45 particles out of every 100 particles in the bottle are HCl?

Does anyone know of a method that can be used to separate a mixture (solids in powdered form) of Fe{2+} and Mn{2+}. I can find many ways for the other ions, but none for these two?

Hello everyone, On asking my teacher, I was told that, UV light readable ink works by changing the frequency of the ultraviolet light to something inside the visible spectrum. While I understood the basic concept, which, after all, was very simple, I couldn't understand how the chemical reduces the frequency of waves. On refraction, the velocity of the light changes and, this is understandable. However, neither refraction, nor reflection change the frequency of light. Also, does this mean that, say, by passing red light through this chemical, infra red light could be produced? …

Hi all, I'm looking into a project measuring the amounts of sodium sequestered in yeast vacuoles. Unfortunately, I'm working in a biology lab with limited chemical expertise and equipment. Additionally, I have a tiny (nonexistent) budget, so buying an ion-selective electrode is out of the question. I've found some tests in the literature involving ion exchanges, but nothing that involves safe, cheap reagents that could be brought into a bio lab without a fume hood. I can probably find the use of that kind of basic equipment if I ask nicely, though. Does anyone know of a safe and cheap technique for measuring sodium concentration? Titration, precipitation, something…

Hello, this is my first post on this forum and if i make some mistake hope you wont be harsh (btw sorry for my poor English) I live in country where it is really hard to get some chemicals (some concentrated acids, some carbonates, some metals.. ) I need Nickel chloride (no need for anhydrous, hexahydrate is ok) so i bought Nickel oxide, black one, Ni2O3. I know there are two different Nickel oxide, green one NiO and black one Ni2O3 (mine is brown / black, cant say it is pure black) Ni2O3 + HCl = NiCl2 + H20 Problem is when i put some nickel oxide in HCl (16 - 18% cause in my country concentrated acids are not so easy to obtain) green color of NiCl2 didnt …

Hi everyone Rapid question: Imagine a reaction between a 0,4 M NaOH-solution and a 0,2 M HCl-solution with equal volume. What are the concentrations then of Na(+), OH(-), Cl(-) and H(+) at equilibrium? Tried to put up a table with initial quantity, difference and rest, but can't go further... HCl + NaOH --> NaCl + H2O 0,2 0,4 0 0 0,2 0,2 0,2 0,2 0 0,2 0,2 0,2 Can anyone help me? Thanks! F. EDIT: I could sove it like this: HCl --> H(+) + Cl(-) 0,2 0 0 0,2 0,2 0,2 0 0,2 0,2 NaOH --> Na(+) + OH(-) 0,4 0 …

Could this often ignored, abundant metal provide an energy source as hydrogen with economical sense ? Is its production too much energy demanding as to discard its potential ? Is there a specific voltage or method that could collect only calcium ions from seawater without other cathodic deposits ?

We completed a redox titration of Iodine (formed from 1M Potassium Iodide (KI), 0.1M Potassium Iodate (KIO3) and excess Hydrochloric acid (KCl) against Sodium thiosufate (Nas2O3) It took 25.8cm3 of 0.1 M Nas2O3 to get rid of the formed Iodine. The question asks: Use the equation below to calculate the amount of iodide ions that reacts with each mole of iodate ions in aqueous solution 2S2O32- (aq)+ I2 (aq) 2I- (aq) + S4O62-(aq) and determine the concentration of iodide ions in moldm-3 I am not sure what this is asking me! Do I need to calculate how the Iodine is originally formed? I am really stuck on this one! Please help.

Is something here correct? Let us say you have this salt: Na3PO4, to this salt you add HCl(aq): Na3PO4(s) + 3HCl(aq) --> 3NaCl(aq) + PO43-(aq) + 3H+(aq) (equation 1) Now phosphate reacts with added molybdate, then added HCl(aq): PO43-(aq) + 3NH4+(aq) + 12Mo2+(aq) --> (NH4)3[PMo12O40](s) (equation 2) According to a lab manual, the product on the right side of the reaction in Eq. 2 is correct. The manual only says that phosphate reacts with molybdate and creates the product in equation 2 - not what the reactions in question look like. I cannot balance the left side of Eq. 2, how is it done? Best regards, Shafaifer

What is/are the product/(s) of the following reaction: Co(OH)2(s) + OH-(aq) (Eq. 1) I can inform you of the earlier reaction leading up to this one: [Co(H2O)6]2+(aq) + 2OH-(aq) Co(OH)2(s) + 6H2O(l) (Eq 2) The precipitate formed in (Eq. 2) is blue. This precipitate then turns red/grey as conc. NaOH(aq) is added. What is/are the product/(s) formed in equation 1? Best regards, Shafaifer

Hello, I have these reactions (they should be correct): CaCO3(s) + HNO3(aq) --> H2O(l) + Ca2+(aq) + CO2(g) + NO3-(aq) Eq. 1 Calcium cations will now form a complex with water according the following reaction: Ca2+(aq) + 6H2O(l) --> [Ca(H2O)6]2+(aq) + 6H2O(l) Eq. 2 Now comes the combustion: This is a project of AAS (atomic absorption spectroscopy), and I want to measure the absorbance for calcium when irradiated with a hollow cathode lamp. I am only interested in calcium so I ignore water, nitrate ions and CO2(g). As a combustion agent / oxidising agent, C2H2(g)/O2(g) is used: [Ca(H2O)6]2+(aq) + C2H2(g)/O2(g) --&…

why pcl5 is covelent and PCl3 is ionic at gasous state?

NaOH(s) + H2O(l) => Na+ + OH- + H2O + HEAT 2 Na(s) + 2 H2O(l) => 2 NaOH(aq) + H2(g) Is the second reaction exothermic? How to calculate energy balance of both reactions?

Could anyone please tell me how I would add a carbon and an oxygen atom to a compound? Thanks

Does anyone happen to know what the strongest Oxidiation and Reducing agents are? I've heared Fluorine can oxidise water and that there are even agents that can oxidise some of the group 0 elements - how sweet! Also, have a hard time remembering which is which, reducing and oxidation, so am I right in saying this: Oxidation agents: take electrons from an element / compound and reduce themselves. Reducing agents: give electrons too an element / compound and oxidise themselves. Cheers, Ryan Jones

Primary battery technology Solve the aluminum from the reaction. Alkaline batteries can be made ​​of aluminum. I'm looking for battery manufacturers, to test I want to contact the battery manufacturer in Japan, did not find the contact details

I noticed that in dry voltaic cells the "cathode" has a surplus of electrons and the "anode" has a surplus of positive charge. Electrons flow from the cathode to the anode to produce an electrical current. However, in hydrogen fuel cells the "anode" has a surplus of electrons and the "cathode" has a surplus of positive charge. Electrons flow from the anode to the cathode to produce electrical current. This is opposite from a dry voltaic cell. What's the convention for determining the anode and cathode? There's a lot of conflicting info on the internet. Thanks.

Hi, I need to conduct soil tests for the plant macronutrients: P, K, N, Ca, S, and Mg. A test for Nitrogen seems fairly straightforward using the Kjedahl Method. According to several online University sources, tests for Phosphorus and Potassium each require the use of a rotating shaker. Is there a method which does not, or an alternative device to the rotating shaker? (I don't have $200+ to spend on a rotating shaker right now). Where can I find detailed methods for determining Ca, S, and Mg content in soil? NOTE: Accuracy should be within +/-0.1%, higher accuracy is not necessary. Thanks, pyroglycerine