Ion Definition and 382 Threads

I have been researching extensively, but am unable to find if the extent of the common ion effect is influenced by the concentration of the common ion already in the solution? For example, if there are two solutions of weak acid which have dissociated to a different extent, would the addition of...

The potential difference necessary to accelerate an He+ ion...? Homework Statement "What potential difference is needed to accelerate a He+ ion (charge +e, mass 4u) from rest to a speed of 1.2×10^6 m/s?" Homework Equations K_f + q*V_f = K_i + q*V_iThe Attempt at a Solution I figure that...

Homework Statement A magnesium ion (Mg 2+) traveling at 60000 m/s enters a mass spectrometer with a magnetic field intensity of 800T. Calculate the radius of deflection forthe magnesium ion. 800T = |B| 24.31g/mol = m 60000 m/s = v 1.66* 10^-27= Atomic mass unit r=? Homework Equations r=...

Homework Statement The hydrogen molecular ion , with one electron and two protons, is the simplest molecule. The equilibrium spacing between the protons is 0.11nm . Suppose the electron is at the midpoint between the protons and moving at 1.5 m/s perpendicular to a line between the protons...

Homework Statement What is the molar concentration of chloride ions in a solution prepared by mixing 100 ml of 2.0 M KCl with 50 ml of a 1.5 M CaCl2 solution...? I don't know where to start... Homework Equations The Attempt at a Solution

Homework Statement What will be the pH of a solution that contains 0.100 M CH3COOH and 0.100 M NaCH3COO?Ka = 1.8x10-5 IMPORTANT: THE REACTION IS NOT BETWEEN CH3COOH AND CH3COO- - My question here is why the ice table was setup as so by the instructor? see below... Homework...

Homework Statement (c) A 0.1036 g sample of copper metal is dissolved in 48 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.1 mL. (Calculate the molarity of Cu2+.) Homework Equations Molarity = Moles/Liter The Attempt at a Solution...

Homework Statement An ion's position vector is initially r> = (5.0m)i - (6.0m)j = (2.0m)k and 10 s later it is r> = (-2.0m)i +(8.0m)j - (2.0m)k. In unit-vector notation, what is its during the 10 s? The answer is supposed to be r> = (-0.7m/s)i + (1.4m/s)j - (0.4m/s)k (from back of my book) but...

Exactly how does the ion thruster rely on the laser in it's process exactly. I have been told that the ion thruster uses a laser but I wasn't given anymore information on what it exactly does.

So I was wondering if I could get some help and advice on a project I am working on. I have next to no experience or knowledge of electrical circuits so I appreciate your patience. I am trying to power a structural health monitoring system "accelerometer" unit on a bridge using...

Whole-cell patch clamp electrophysiology can be used to record: a. the activity of the ion channels that are present in the patch of membrane. b. the activity of multiple neurons at a given time. c. voltage and/or current across the membrane of a cell. d. multi-unit activity...

Homework Statement When 50.0 mL of a 2.0 × 10-4 M Ag2CrO4 solution was added to 50.0 mL of a Na2CrO4 solution a ppt formed (Ag2Cro4). What was the initial concentration of this Na2CrO4 solution? Ksp Ag2CrO4 = 1.1 × 10-12Homework Equations Given A2 (aq) + B(aq) -> AB(s) Ksp = [A]n[B] The...

Water ion product constant? Conceptually, why does this constant exist so that the products of hydronium and hydroxide ions are always in a constant ration? Why does this not fluctuate?

Hi all, I have a question about trapped ion. How can they achieve such stable frequencies if the power supply which supply's the ion trap drifts over time? For example if you use a paul trap as an atomic clock, how do you compensate for any fluctuations in power supply voltage and frequency?

This question might sound very simple, but I couldn't find a relevant answer by googling; Assume Fe3+ is to be implanted in some target, how to get the 3+ ions to be implanted and not the 2+ or 1+ ? Thanks for your contributions.

Homework Statement An ion thruster may be used to change the speed of a satellite, through the emmisions of charged particles. Positive xenons ions are accelerated by the potential difference(deltaV) in the region between grid A and grid B as they move towards the right of the diagram...

Homework Statement Order each of the following sets of five atoms and ions according to decreasing size. (i.e. "1" largest and "5" smallest) N, Br-, Cs, P, Mg2+ Homework Equations When an atom loses electrons (becomes more +), its size decreases. Conversely, when an atom gains...

Homework Statement Imagine water in a metal bowl that is open to air. This metal bowl is grounded. You add some NaCl to the water. What would the distributions of the ions look like in the water. Homework Equations I think this doesn't need equations, but just general understanding...

I just started learning about cellular respiration and I'm not clear as to what the word "gradient" means. I see it tied to many terms such as electrochemical gradient, proton gradient and ion gradient. Is a gradient just a space or "field" with varying concentrations of something (protons...

I was wondering at the remarkable fact that when an atom has an extra electron it is then possible to apply forces to it to accelerate it. What I find remarkable is the fact that even a heavy ion like mercury where the nucleus is many orders of magnitude more massive than the one electron that...

I design weapons for fun and have just heard of an ion bomb. First off is It even possible to use ions to make a destructive device?

This is just a little question to satisfy my own curiosity, but can the Negative Ion of an Oxygen atom/molecule be used as an oxidizer? I would think not, because it wouldn't be able to accept another electron if it already has one. Am I right?

Hello; My physics teacher told me that there was a way to calculate the ionic charge of a transition metal given its electronic configuration, but he did not tell me how, because it is 'too complicated'. I can't find any useful webpages on the subject, either... my teacher said that the...

(Note: I am posting this in the classical physics section because it has a connection with Thermodynamics, also this is NOT a homework question, I am just trying to get a handle on what is going on) I was looking through some old questions I had written down and decided I would ask to see if...

Homework Statement An ion of charge 1.6 x 10^(-19) C and Kinetic energy 2.0k eV enters perpendicularly into a uniform magnetic field .The ion performs a circular path of radius 4.3 cm .Determine the mass of the ion if the magnetic field intensity is 0.5 T. Homework Equations The...

What I am trying to do is replace my 12v 5Ah lead-acid battery with a 14.8v 6600mAh lithium ion battery. It powers a small fan belt. And for some reason I can't get the lithium battery to work. Can somebody tell me what I might be doing wrong, or if it will even work?

Homework Statement Hi everyone, I need help understanding something. My assignment is talking about the dissociation of CaCl2 and NaHC03- in water and heats of solution etc and says: "Write out the K_a and K_b for the bicarbonate ion with chemical equations". Problem is though that I don't...

Hello; Is this statement true? A hydrogen positive ion would have no electrons, and pure hydrogen itself has no neutrons. Therefore, would it simply be a proton? Thanks.

Calculate the milligrams of metallic ion that can remain at equilibrium in a solution of Fe(OH)3 having a [OH-] = 1.0 x 10-4 mol/L and Ksp = 6.0 x 10-38.

Hello; What is the ionic formula for a carbon-12 ion? It has 4 electrons in its 2nd shell with a capacity of 4, so does that make it C4+ or C4-? I think that it is C4+, because in order for it to bond with the oxygen molecule, O2, it must be positive, as the oxygen ion is negative... is this...

Hi! If I dissolve MgCl2 in distilled water, will it form into [Mg++] + [Cl-] + [-Cl] ? or [Mg++] + [Cl2--]? -And Why? is it because of stability constants? -Also Are there any intermediate steps in the process? Similarly, If I dissolve MgSO4 in distilled water, without electric currents or...

Can anybody tell me what actually is difference between between electron hole and positive ion.

This is an idea I had and felt it worth publishing. The reason fusion is so difficult is because the particles are so light, small, and have difficulty overcoming the coulomb barrier. Well I got to thinking and noticed that it'd be a lot easier to get heavy nuclei to fuse, but naturally they'd...

Homework Statement Why does NH3 readily form complex ions with the transition elements but NH4+ does not? Homework Equations The Attempt at a Solution Is it because the transition elements are much more receptive to reacting with a base than with an acid because in fact the...

Homework Statement (a) Explain the term Hydrogen like ion and determine the quantum numbers l,m for the Li2+ ion in the states for which n=1 and n=2. (b) Explain why for a hydrogen-like ion it is reasonable to use the relations, \mu\approx{m_e}, {E_n}=-13.6\left(\frac{Z^2}{n^2}\right)...

Homework Statement Calculate number of channels present in a lipid bilayer q = 1.6^-19; D (diffusion constant) = 1.2E-9; C (Concentration); 4.36; k = 1.38E-23; T=298; d = 2.5E-9 Therefore G1 = 1.27E-17 Channel area = 7.07E-18 measured conductance (from injecting Na+...

Homework Statement In natural water containing 0.9 mmol/L calcium and 12 ug/L fulvic acid, determine the fraction of the fulvic acid that is bound to calcium (i.e. the ratio between the concentration of Ca-FA and total concentration of FA binding sites), assuming that calcium is the only metal...

Homework Statement A beam of ions enters a region in which the electric field E and magnetic flux density B are normal to each other and both normal to the velocity of the ions. Show that if the velocity of the ions is related to the fields by v=ExB/B2 then the ions pass through the...

A quick google search reveals conflicting opinions on whether or not this will have a negative impact on battery life. I carry my laptop outdoors with me every day on my walk from the train to the hospital, do I need to worry about the cold ruining my battery?

Does anybody know how to find bonding force of an optical electron and the nucleus of ion Cr3+ (in pink ruby during normal and excited states (excitement of light))? And also how to find the magnetic moment of the same electron during EPR (during excitement by a radiowave)? Condition of the...

Homework Statement 21.76g Cr(III) Sulfate is dissolved in enough water to give 500.0 mL of solution. 10.00 mL of this solution is pipetted into a 250.0mL volumatric flask and diluted to the mark. a) Calculate the molarity of Cr(III) Sulfate in original solution b) Calculate the molarity of...

I'm x-posting this from the Aerospace Engineering forum, to see if I can get more responses here -------- I'd read about the investigation into using C60 fullerenes as propellant in an ion engine, due to their high molecular weight and low ionization energy...

Not asking for a schematic, more a notion of roughly how challenging this will be.

An ion of 64Zn30+ with an initial kinetic energy of 9.88 keV is accelerated across a potential difference of 277 Volts. What is its kinetic energy after acceleration (in keV)?

This is probably something I should know, but I don't want to wait and ask my professor. In the combustion of H2, assuming O2 is plentiful enough not to be a limiting reactant, H2O forms as a result of the O-H bond being more stable than the bonds between two H or two O. Is this due to the...

Homework Statement The ion source is a spectrometer produces both singly and doubly ionized species, X+ and X2+. The difference in mass between these species is too small to be detected. Both species are accelerated through the same electric potential difference, and both experience the...

Hi All, A potassium channel is designed to filter out potassium ions at a maximum rate of 100,000,000 ions s-1 A common concentration (cell's interior) of potassium is 100 mM and 5 mM outside. This means there is 553 water molecules for 1 potassium ion inside (55.3/0.100) and 11,060 water...

I know H_2^+ is a bound state of an electron and two protons, but what's \text{HD}^+? Is the D just a stand-in for an arbitrary nucleus that may, or may not, be a proton? I found the following website with information about this cation that leads me to believe that the "D" is not just a...

I was arguing with my NASA friend the other day about what would make a more efficent propellent for an ion engine. Is it a lighter ion or a heavier ion. THis was what I derived. Assume a charge q of mass m is accelerated through a potential V. The mass of the ship is M. Working through...

Hi there, I've got a distribution function for an assignment for my school here and I don't get the hang of the question; f(x) = θ* 2^θ * x^(-θ-1) for x>2 0 for else The assignment is to calculate the Cramer-Rao lower boundry for consistent estimators...