Ions Definition and 332 Threads

Hi I was wondering if anyone might be able to offer an explanation why the Fe3+ complex ion containing 5 water ligands and 1 thiocynanate (the classic blood red complex) appears to be able to distribute equally between an organic and an aqueous layer but a cobalt 2+ complex ion containing 4...

Hey guys, just a quick question: If you have a solution of nitric acid, and if you were asked to find the concentration of H+ ions in the solution, would you find the concentration of H+ ions in the acid plus in the water? Re-wording of question: you find the moles of H+ ions in acid +...

Alright guys, I am a little bit confused on how to find the concentration of ions in a reaction. In a solution, it is relatively easy. Are the number of ions in the beginning the same they are in the end? Please give me some general guidelines: i know to begin with a balanced equation ...

Hello everyone, This a question related to ATP pump that uses electrochemical gradient to provide energy to make ATP. I have few questions about this. 1. In an electrochemical gradient there are more positively charged ions on one side of the membrane(In proton gradient case). So why do...

Hello guys, So there are hydrogen ions inside the cell which is pumped out in cellular respiration. Now my question is when they say hydrogen ions are inside the cell are these actually dissolved in water, ions can not exist without being dissolved right, why is that they are so reactive...

Homework Statement Name each of the following ions: CN- O2- OH- Homework Equations none The Attempt at a Solution What exactly is this asking? How do I find this?

In Industry, what kind of plants would need to measure metal ions in their process streams. Ions that interest me are copper, nickle, iron etc. I've been trying to find some information, but only found some limited information on nickle but it did not include the information that I want, what...

Homework Statement How far would the spot on the photographic plate be from the entry point for each ion, assuming that each ion completes half an orbit? I am given three ions, N+subscript2, O+subscript2, NO+ They have atomic masses of N=14.0031amu and O=15.9949amu. I am given the...

In a gas laser, an electron in the highest energy state absorbs photon for stimulated emission to occur, but now since it has more energy than its highest state, shouldn't it escape the atom and the active medium be left only with positive ions?

Homework Statement The electric dipole moment of a CuSO4 molecule is 3.2 * 10^-32 (i.e. 10 raised to the power of -32)C-m. Find the separation between the copper and sulphate ions. Homework Equations Electric deipole moment = 2aq where 2a=separation between the two charges q and -q...

Zn---Zn+2 + 2e-

Hello! I am doing an investigation on thermodynamic propeties of certains heavy ions "Alkali-Cloride" ions on the basis of mass spectroscopy and quantum mechanical calculations. For that i use GAMESS as a computer tool to study quantum mechanical properties of those ions (vibration frequency...

Homework Statement A. Find the electrostatic force between a Na+ ion and a Cl- ion separated by 0.5 nm. B. Would the answer change if the sodium ion were replaced by Li+ and the CL ion by Br-?Explain. Homework Equations I believe you have to use Coulomb's Law...? F=k* [(/q1//q2/)...

Hello! I would like to ask anyone who can have documents about the thermodynamic properties of CsCl, Cs2Cl+, CsCl2-,Cs3Cl2+,Cs2cl3- to send me the links please. or anything else that can be related to thermodynamic properties of heavy ions. Actually i want to make a research on their...

This isn't homework - just working through questions in my text. The question gives two concentrations of calcium ions inside and outside the membrane and asks to find the Nernst potential - ok no problem there. Then it asks if the calcium ions are in equilibrium if the resting potential is...

Homework Statement Have to determine permeabilities \alpha and \beta (PNa/PK and PCl/PK) as well as internal concentrations of Na+, K+ and Cl- I have calculated different membrane voltages according to the external concentration (when altering one ion, the other two were set to zero)...

In a particular spectrometer, doubly ionised C (atomic no. 6 mass no. 12) and singly ionised Li (atomic no. 3 mass no. 6) atoms are detected. The ratio of the path radii is 1.00252, the Li having the larger value. The fields are constant. a)Find the mass of the lithium ion. Okay so i...

Homework Statement 2KMnO4 (aq) + 10FeSO4 + 8H2SO4 --> K2SO4 (aq) + 2MnO4 (aq) + 5Fe2SO4 (aq) + 8H2O (aq) Homework Equations Spectator ions don't participate in the reaction. The Attempt at a Solution What gives? Is my professor bent on making our lives miserable? The answer...

Homework Statement The answer is [ H3O+ ] > [HSO4-]>[SO4-2]>[OH-], but I do not understand how they got it? Homework Equations The Attempt at a Solution First I tried to put H2SO4 into water and got HSO4-. Then I tried to make an ice table, but it didn't work out since Ka for...

Hi, How would you determine the relative atomic sizes of a neutral atom and an ion? I can't figure this out. It can't be that all neutral atoms are always smaller than all ions can it? For example, how would I determine if Cl- is smaller or larger than S?. (The answer is that Cl- is...

Recently in Russia they published a book about a specific accelerator of ions. The ions are accelerated by electrons. They built an accelerator of 15 cm in length, with 1 MeV of electron beam and they obtain ions of 1 GeV at the exit. I wonder if there are similar accelerators in the West?

Homework Statement Which of the following processes release energy to the surroundings? -Removing an electron from a neutral atom -Separating a sodium ion (Na+) from a chloride ion (Cl-) -Removing an electron from a positively charged ion -Elevation of an electron from a lower energy level...

Lets say I have a solution of NaCl and decide to add some AgNO3. I know a white precipitate will form so obviously some Ag+ ions have dropped their NO3- counterparts and combined with Cl- ions instead. Why does this happen? Is it all to do with electronegativity? Is it a simple matter of Cl-...

Homework Statement How many total moles of ions are released when the following sample dissolves completely in water? 2.63 g of CuSO4 * 5H2O Homework Equations 159.611 g / mol of CuSO4 The Attempt at a Solution I tried doing 2.63 g / [159.611 g / mol] to get .016477 mol of...

Homework Statement Sodium ions (Na+) move at 0.844 m/s through a bloodstream in the arm of a person standing near a large magnet. The magnetic field has a strength of 0.259 T and makes an angle of 59.0° with the motion of the sodium ions. The arm contains 95.0 cm^3 of blood with a...

Homework Statement Fluoride ion is poisonous in relatively low amounts: 0.2 g of F - per 70 kg body weight can cause death. Nevertheless, in order to prevent tooth decay, F - ions are added to drinking water at a concentration of 1 mg of F - ion per L of water. How many kilograms of sodium...

Hi, I am having trouble with the following: All I have really done is differentiate the function to give an expression for F(r), but I am a bit clueless about the rest. How can there be equilibrium if the two ions are attracted to each other? Cheers, GeoffreyThelm

A section of an advertising sign consists of a long tube filled with neon gas having electrodes inside at both ends. A uniform electric field of 20 kN/C is set up between the electrodes, and neon ions accelerate along the length of the tube. Given that the ions each have a mass of 3.35 X 10-26kg...

Hello, From what I've been reading, 70eV electrons are the standard for electron impact ionization in mass spectrometry. I'm trying to get a feel for how much kinetic energy on the average is imparted to an ion. I know this gets complex, when you start talking about multiple fragments...

I am prepare for a practical experiment, this is a practical experiment aim to identify the anions and cations in the solution, and those ions are choosed from Pb, Ba, Ca, Cu,Fe2, Fe3 and CO3, Cl, PO, SO, NO3. where can i find the solubility in water for any ionic compound that can be formed...

Homework Statement There are three main isotopes of carbon, with the following atomic masses: Atomic Masses 12^C 1.99 x 10^-26 kg 13^C 2.16 x 10^-26 kg 14^C 2.33 x 10^-26 kg The atoms of carbon are singly ionized and enter a mass spectrometer with magnetic field strength B = 0.200 T at...

I'm sure you'll all think I'm brain damaged but i was wondering if water, polarized within an electric field, might exhibit some magnetic properties... with the molecules having a slight electric dipole, could the 2 positively charged H atoms be thought of as an electric current of sorts...

sorry if this has been asked before, i did a search and couldn't find any results. Explain fully what happens when H^+ is added to a mixture containing BaCrO_4(s) and CrO_4^2^-. The overall equation of ions in this experiment is...

Homework Statement An absorption line at 6966 eV is known to come from a hydrogen-like ion. Calculate the likely atomic number of the element and hence identify it. (The ionization energy of hydrogen is 13.6eV.) Homework Equations not sure The Attempt at a Solution Using...

The following is a multiple choice question on a previous quiz I was given: Homework Statement Ions of type A with a charge of +2e and a mass of 4 amu (atomic mass units) and ions of type B with a charge of +3e and a mass of 20 amu are at rest on one side of a cell wall. Both pass...

Homework Statement In most metals, the atomic ions form a regular arrangement called a crystal lattice. The conduction electrons in the sea of electrons move through this lattice. The figure (Intro 1 figure) is a one-dimensional model of a crystal lattice. The ions have mass m , charge e ...

Homework Statement In an electrochemical cell what would happen if an electrolyte is conducting both ions and electrons? Homework Equations The Attempt at a Solution So I know electrolytes usually conduct ions and are electronic insulators. I know the electric current that...

[b]1. A singly charged positive ion has a mass = 1.08e-26 kg After being accelerated through a potential difference of 240 V the ion enters a magnetic field of 0.595 T in a direction perpendicular to the field. The charge on the ion is 1.602 e-19 C. Find the radius of the ion's path in the...

How many moles of ions are in 0.0200g AgNO3. Please help, i can't seem to set up the equation!

How do you make positive ions? I found a kit device that is made of a bunch of capacitors and diodes that's supposed to make negative ions (it says to reverse the diodes to make positive ions) how does this work? Wikipedia and HowStuffWorks weren't much help. Wikipedia explained what diodes...

Homework Statement Living cells actively “pump” positive sodium ions (Na+) from inside the cell to outside the cell. It’s called pumping because it requires work to move the ions from the negatively charged inner surface of the cell membrane to the positively charged outer surface. It...

Im trying to make a particle excelerator for school using - ions but i can't find any b prints or anyone who can help me. if anyone can help or find some one that could at least explane some of it to me, it would be much appreceated

Homework Statement In a fluorescent tube of diameter 3 cm, 10 *1018 electrons and 2.5 * 1018 positive ions (with a charge of +e) flow through a cross-sectional area each second. What is the current in the tube? Homework Equations Current is I = (delta Q)/(deta T) The Attempt at...

Homework Statement Calculate the force of attraction between Ca2+ and O2- ions whose centers are separated by 1.25 nm. The Attempt at a Solution Well, I believe this is a matter of electrostatic force (Coulomb's Law)...but I am not sure what to use for the values of q1 and q2 Is it just the...

1. Acceleration between plates You have a summer job as an assistant in a University research group that is designing a devise to sample atmospheric pollution. In this device, it is useful to separate fast moving ions from slow moving ones. To do this the ions are brought into the device in a...

Homework Statement You are trying to separate 2 types of ions (fast and slow). The fast ones travel at 1000m/s and the slow ones travel at 100m/s. At the beginning you have 2 plates. One has + and the other one has negative charge. The size of the plates is 5cm and they are 3 cm apart...

Homework Statement Hey guys, this is from Purcell 3.19 "Ions are accelerated through a potential difference V_0 and then enter the space between the semicylindrical electrodes A and B. Show that an ion will follow the semicircular path of radius r_0 if the potentials of the outer and inner...

Homework Statement The net energy is given by: E_N=-\frac{A}{r}+\frac{B}{r^n} where A, B , and n are constants and r is the interionic separation. Calculate E0 in terms of A, B, and n by the following procedure: 1. find dEN/dr 2. set this expression equal to zero and solve for...

Homework Statement Some hydrogens and deuterium ions are accelerated by a potential difference V. These ions entered then in a region with a magnetic field B orthogonal to their velocity. In the position H and K (along the axis parallel to the velocity) there are two sensors and the distance...

Hello I'm wondering if someone can explain how OH- ions physically move from the anode to the cathode within an electrolytic cell (w/ pure water) . Do they physically migrate from one side to the other? Or do they just pass electrons/protons back and forth between other ions H3O+ to the...