Equation for ion exchange selectivity
WebMay 20, 2013 · The thermodynamic treatment of cation exchange selectivity has 2 fundamental problems: hysteresis is sometimes observed in ion exchange reactions involving 2 : 1 phyllosilicates , and when … Webequation (3) can describe potential behavior of the glass electrode (ref. 7). Later, they showed theoretically that the potential of a monovalent ion-selective ion-exchange liquid membrane as well as a neutral carrier liquid membrane in a binary mixture of monovalent cations can also be fitted to equation (3), where n =1 (refs. 8, 9).
Equation for ion exchange selectivity
Did you know?
WebFeb 28, 2003 · The higher the ion-exchange selectivity of a specific ion, the lower is its hydrated ionic radius and, hence, more permeable is the ion. The theoretical relationship … WebI got the std of the current values and multiply by 3 then I substitute the result in the calibration equation to get the concentration but I got value higher than my smallest …
WebGlass membranes are made from an ion-exchange type of glass ( silicate or chalcogenide ). This type of ISE has good selectivity, but only for several single-charged cations; … WebJan 1, 2005 · This chapter introduces the most widely used exchange equations in soil chemistry research, including the Vanselow, the Gapon, and Gaines and Thomas equations. ... Ion selectivity reflects the outcome of many interacting factors between cations and surfaces, making it difficult to incorporate all these factors quantitatively into …
WebJan 1, 2016 · The permselectivity can be calculated from the transport number of the counter- and coions in the membrane and the outside solutions. The permselectivity of a membrane is given by: {\Psi}^m=\frac {T_ {\mathrm {co}\mathrm {u}}^m- {T}_ {\mathrm {co}\mathrm {u}}} {T_ {\mathrm {co}}} (1) The transport numbers are defined by: Web¾Key Equations • Resolution • van Deemter ¾Common terms & definitions ¾Key parameters & conditions that affect them • efficiency, selectivity, and retention ¾Role of pressure •Sub-2um. Separation Fundamentals Agilent Restricted December 11, 2007 ... Ion Exchange Chromatography Basic proteins on strong cation exchanger (-SO 3-) 1 ...
Webi) The SACERs at low concentrations and normal temperatures are mare selective toward high valence ions: e.g. Na+ < Ca2+ < AIS + < T h 4+ ii) The IERs are more selective toward ions with higher atomic number among ions of the same ionic valence: Li+ < Na+ < Rb+ < Cs+; Mg2+ < Ca2+< Sr2+< Ba2+ though such selectivity differences are smaller than …
WebFeb 6, 2024 · The ion exchange ratio in Table 5 is defined as the ratio of the quantities of anions on a charge basis to the AEC [Equation 2 ]. (2) Table 5. Results of individual adsorption a of SO 42–, NO 3–, or F – a Liquid-to-solid ratio = 0.02 g/5 mL. otb financeWebJun 1, 2024 · The ion selectivity between two counter-ions A and B, P B A, is defined as [5], [6]: (14) P B A = t A / t B C A / C B where t i represents the transport number of ion i … rocker arm manufacturing processWebJan 1, 2012 · The basic principles of ion exchange like ion exchange equilibria and capacity are useful for understanding the process of ion exchange. The selectivity coefficient and exchange isotherm have been discussed in terms of thermodynamics and equilibria. The diffusion and transport have been illustrated within the context of … rocker arm pressure switch honda odysseyWebThe selectivity of these ion-selective electrodes is determined by the relative solubility of the compounds. A Cl – ISE using a Ag 2 S/AgCl membrane is more selective for Br – ( K Cl – /Br – = 10 2 ) and for I – ( … rocker arm ratio bbcWebJun 7, 2024 · The anion selectivity coefficients of NO3- over Cl- ( ), and SO42- over Cl- ( ) for three types of AEMs (ASE, ACS and FAA) obtained with the ED method (hollow triangles), with the ionic ... rocker arm noise motorcycleWebFeb 15, 2010 · Change in the logarithmic selectivity coefficient, log KIJpot, as a function of the molar cation-exchanger concentration in the membrane, RT, according to eq (26) … rocker arm needle bearingsWebequilibrium constant can be defined for the reaction. The equilibrium expression K has been named the selectivity coefficient, exchange coefficient and other terms. For the reaction: … rocker arm oil deflector clips / oreilly\u0027s