Ion Definition and 382 Threads

Hi, I m 21 and am studying Chemistry in my spare time, I haven't done it since i was 15 so I am only a beginner and i do not understand simple things lol, Here's one such example; carbonate ion, CO3^2-, is a polyatomic anion with 1 carbon atom and 3 oxygen atoms. The ion has two units of...

Homework Statement How many moles of solid sodium fluoride should be added to 1.0 L of a saturated solution of barium fluoride, BaF2, at 25OC to raise the fluoride concentration to 3.0 x 10-2 mol/L? The solubility product constant for BaF2 is Ksp = 1.7 x 10-6 at 25OC. The Attempt at a...

Homework Statement Explain, in two or three sentences, why the O7+ ion can be considered to be a hydrogen-like ion. State what subatomic particles it is composed of and how many there are of each Homework Equations The Attempt at a Solution I know the correct answer to...

Learning device, help me expound: on Faraday's choice of "ion", and "unionized" So I was writing down some notes to myself on electrochemistry (100 level college chemistry---elementary electrochemistry chapter) and I wrote down the word "unionized" (as in, 'un-ionized') and realized that there...

Homework Statement Large electric fields in cell membranes cause ions to move through the cell wall. The field strength in a typical membrane is 1.0x10^7 N/C. What is the magnitude of the force on a calcium ion with charge +e? Homework Equations E = F/q > F = Eq The Attempt at a...

Homework Statement A singly charged proton ion of 7 Li has a mass of 1.16E-26 kg. Starting from rest it is accelerated in the positive x-direction through a potential difference of 165 kV. The ion then enters a uniform magnetic field that has magnitude 0.325 T and is directed in the negative...

How can you know if a complex ion has an optical isomer or not? I understand that it's when the mirror image can't be superimposed but am having trouble recognizing it. For example, take [Co(NH3)4F2]+. Does this have an optical isomer or just cis/trans?

Homework Statement A mass spectrometer applies a voltage of 2.00 kilovolts to accelerate a singly charged ion (+e). This ion then enters a region of uniform magnetic field (B= 0.400 T) which then bends the ion into a circular path of radius 0.305 m What is the mass of the ion? Homework...

Homework Statement What potential difference is needed to accelerate a He + ion (charge +e, mass 4 u) from rest to a speed of 2.0 * 10^6 m/s?Homework Equations Kf + Uf = Ki + Ui U = qV where V is potential difference (volts) K = (1/2)mv^2 The Attempt at a Solution I chose the rest point to...

Homework Statement A. When current flows in an ionic solution, both negative and positive ions are charge carriers. In the dilute limit, the resistivity of the solution is inversely proportional to the concentration. For example, the resistivity of salt water solution at 25 °C is ρ =...

I got this idea that I could maybe replace the heavy lead acid battery on my motorcycle with a lithium ion polymer battery. I found that you can buy batteries for RC cars that match the power requirements. The lead acid battery is 12 volts, 6Ah. It seams that L.I.P. batteries for RC cars are...

Homework Statement A doubly ionized atom (charge = +2e) whose mass is 5.15E-26 kg is accelerated by a voltage of 3450 V and enters a region where a uniform magnetic field B = 0.100 T acts perpendicular to its motion. What is the radius of curvature of the path of the ion in the B-field...

I'm asked to derive two equations related to ion channel kinetics. First, some background. These are two-state ion channels (open-closed) with the form shown below: http://img9.imageshack.us/img9/2039/testsg5.gif The first equation represents the open probability of the channel...

Greetings, I'm trying to get an intuitive understanding about a process involving an ion mobility that (I'm told) has D = 9.3 x 10-5 cm2/s. I'm assuming that D is a diffusion coefficient. I'd like to know approximately how long it takes for the ion to travel about 10 cm. Would this be...

Leaving the physics out of this, I'm working on an idea for an in home MHD generator. I'm trying to figure out a conductive fluid to use. I'm back to the idea of salt water, or H20 + NaCl. I know this is a very conductive solution, but I'm no chemist. What I plan to do is put a MHD generator and...

Homework Statement we are mixing CuSo4 (Cu2+) with an iron (Fe) powder and we are trying to determine whether Fe2+ forms or Fe3+ now the question is : suppose that 1.0 g of iron is used in the experiment. what is the minimum volume of Cu2+ solution that must be added in order to completely...

Homework Statement The element Be has 4 electrons and 4 protons in the atom. An ion of Be has all the electrons removed except 1, so it resembles a hydrogen atom with a nuclear charge of +4 e. Constants: E1(Hydrogen)= -13.6eV, r1(Hydrogen)= 5.29x10-11m. If a gas is made up of ions...

I'm extremely confused in regards to many aspects concerning polyatomic ions. For one, am I correct in thinking that covalent polyatomic ions gain charges by having components dissociated? Ex. A and B are sharing an electron, A has a significantly greater hold, B is dissociated by something...

Do any of you get this channel? Have you seen the show "Get Out"? It's a travel show where these three girls travel around the world and tell you about it. Oh, and they only wear bikini tops and they only go to tropical areas. I can't get enough of this show. It is so sexist, because these girls...

Hi All, A stupid question for sure (sorry). Does a moving ion, since it carries an electric field, creates some kind of electricity ? (This concept remains unclear for me)

hello, everyone, I am not in this filed. So I get a simple question. Besides field emission and thermionic emission, is there any other means to excite the eletron and get electron beam. Could anyone tell me some basic similar ways to excite the ion and photon? Thanks.

This is my first post, so please move if it is not in the correct section. Anyway, I would like to read about the physics of ion traps. Can anyone recommend any e-books or textbooks on the subject? I googled it but didn't find many things...

Homework Statement Name of complex ion CuCl4^2- The Attempt at a Solution I wrote tetrachlorocuprate(II) ion and my teacher says it is incorrect. I should write tetrachlorocopper(II) ion

Now scientists can trap one ion in the ion trap. I think this technology is very advanced. In 1986 both of Dehmelt's group and Toschek's group firstly trapped the Ba+ ion. Now after 20 years, the ion trap technology has gotten greater progress. I have some questions. Nowadays what ions have...

My kids have a Peg Perego John Deere Gator tractor that uses a 12v battery. https://www.amazon.com/dp/B000G0KT6Y/?tag=pfamazon01-20 The battery requires monthly charging or it will die. The charge is slow and the winter months are a hassle. I could replace the battery but I'd rather...

Hi all, I'm currently in the works of experimenting and writing up my Extended Essay on Chemistry for the IB (it is basically a very long lab report). I have chosen to do the sub-topic of electrochemistry, within which I am interested to do something on the Lithium-ion battery. However, this...

Homework Statement does the ph increase , decrease or remain the same on addition of each of the folling a) LiF to an HF Solution B) KI to an HI solution C) NH4Cl to an NH3 solution Homework Equations The Attempt at a Solution i got the equations and the answers to these i just...

Homework Statement does the ph increase , decrease or remain the same on addition of each of the folling a) LiF to an HF Solution B) KI to an HI solution C) NH4Cl to an NH3 solution Homework Equations The Attempt at a Solution i got the equations and the answers to these i just...

Homework Statement An ion is accelerated through potential diff. of 250 V, directly perpendicular to mag. field. Find radius of the path of the ion in the field. Given: mass (m)=2.5 x 10^-26 charge(q)= 1.6 x 10^-19 Volts= 250 V Mag. Field (B) = 0.50 T Homework Equations...

I have seen the frequency of the electron in the ground state of the hydrogen atom as 6.58 x 10^15 Hz, however I have never been able to find the ground state frequency of the electron in the hydrogen molecular ion (H+). The equilibrium separation of the two protons is given as twice the Bohr...

I have a couple of different lithium ion battery packs. On one pack charging current reads 0.1 amps, and on the other 1.5 amps. I already charged the 0.1 amp pack with 0.1 amps, and seems to be working. Now, I'm sort of weary charging the other pack with 1.5 amps. Doesn't that seem too much...

The dipole moment of the water molecule ({\rm H}_{2}{\rm O}) is 6.17 \times 10^{-30}\;{\rm C \cdot m}. Consider a water molecule located at the origin whose dipole moment p_vec points in the positive x direction. A chlorine ion ({\rm Cl}^{-}), of charge -1.60 \times 10^{-19}\;{\rm C}, is located...

fajans rule?? hey can anyone help me with fajans rule? after the emission of alpha rays from a radioactive substance the product remaining has a valency of 2. after the emission of beta rays it has a valency increase of 1. so the ionic depletion changes the valency. thus meaning reducing the...

Does anyone know why we prepare F- containing solutions with plastic beakers and cups instead of the regular glass beakers before measuring the responses with F- ion selective electrode Is it because F- in corrosive? where can i find infomation on this? Thanks a lot~

ok, I am not a physics student, engineer, or mathematician, but i have an idea i need to know will work or not. we've all undoubtedly seen star wars ep 1 with the podracer race...floating engines. would an alternator connected to a turbojet produce enough voltage to power an ion lifter? are...

What is the pH change of a 0.270 M solution of citric acid (pKa = 4.77) if enough sodium citrate is added to make the final concentration of the common citrate ion 0.145 M? Okay so first I did an ice-table using the equation: citric acid + water <--> hydronium + citric ion Using an inital...

[SOLVED] Ion concentration Homework Statement http://img225.imageshack.us/img225/9918/chemch0.jpg Homework Equations C = n/v The Attempt at a Solution My work is shown up above. Sorry if my work looks a little messy. My answer is 27.6 grams.

Homework Statement A Xenon (mass = 131 AMU) ion propulsion system has specific impulse 4920.0 sec. Calculate how much Xenon (in kg) required to maintain GEO orbit for 12 years for 8000 kg spacecraft . Assume thrust = .046 N. Calculated this to be 360 kg. Asked to find other...

The question: How many grams of Ba(IO3)2 can be dissolved in 700mL of a 0.100M KIO3 solution at 25C? use activity coefficients for this. (Ksp of Ba(IO3)2 =1.57E-9) my answer: I used this equation: Ksp = (concentration) * (activity coefficient) well i found out that my ionic strength...

Is it possible to build an ion cannon(it's a super weapon that orbits around the Earth in space) with the technology we currently have or will have within the next 5-10 yrs?

The question is : For AgBr at 25C, with Ksp= 5.0E-13 For KNO3 solutions: μ=0.050 γAg+ =0.8105 γBr- =0.8227 μ=0.0100 γAg+ =0.7565 γBr- =0.7794 μ=0.150 γAg+ =0.7199 γBr- =0.7529 μ=0.200 γAg+ =0.6914 γBr- =0.7340 Find the molar solubility of AgBr in 0.100-M potassium...

In our analytical lab we were given an unknown solution containing up to 4 anions - fluoride, chloride, nitrate, sulphate and phosphate. It was diluted, run through the chromatograph and a chromatogram was printed for 3 trials. Then we printed chromatograms for two different standard solutions...

Hi. In class recently, we performed a reaction where we added potassium permanganate solution to a solution of sodium hydroxide, followed by a few grains of glucose. The resulting solution was green for a short time, and then quickly went to an orange colour. Im not very sure about what...

Homework Statement What is the iodide ion concentration in a solution if the addition of an excess of 0.100 M Pb(NO3)2 to 37.2 mL of the solution produces 539.7 mg of PbI2? Homework Equations possibly c(1)*V(1)=c(2)*V(2) is pertinent to the problem The Attempt at a Solution I...

Homework Statement A solution is found to be 0.0330% by weight AlBr3. What is the concentration of the Br1- ion expressed in ppm? Homework Equations The Attempt at a Solution Assume .0330 % => .0330 g AlBr3 .0330 g AlBr3*(1 mol AlBr3/266.697 g AlBr3)*(3 mol Br^-1 /1 mol...

I need to calibrate ion flow chambre,dont know exactly how. I don't know also how to relate Bq/m3 to doserate mSv/h. Are there any doserate limits,instructions suggest that there are.

Hello, I have been searching for sites recently on complex ion chemistry and I have found a few good hits, but sometimes it seems the authors are vague as to the actual complex formed, and which complex actually causes the color change. For example for NH3 mixed with Copper 2, one source...

Homework Statement What is the solubility of Mg(OH)2 in a solution buffered at pH 8.80.Homework Equations The Attempt at a Solution The answer is .45 M or 26 g/L but I can't get that for some reason. I can find the concentration of hydroxide [OH-] = 6.3 x 10-6 Mg(OH)2 -> Mg+2 + 2OH-...

Like this one: http://www.goldmine-elec-products.com/prodinfo.asp?number=G9695 I understand that it uses some sort of "needle assembly," and electric fields are stronger at sharp points in a conductor and then will ionize the surrounding air at a certain potential. But how exactly are the...

I'm fairly familiar with the design and operation of an ion engine, although I do have a two questions in regard to its operation. 1) Normally, an ion engine would be used in space (which is naturally a vacuum) and would output its given thrust. Prior to space flight, is there a need to...