About: Debye–Hückel equation

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The chemists Peter Debye and Erich Hückel noticed that solutions that contain ionic solutes do not behave ideally even at very low concentrations. So, while the concentration of the solutes is fundamental to the calculation of the dynamics of a solution, they theorized that an extra factor that they termed gamma is necessary to the calculation of the activity coefficients of the solution. Hence they developed the Debye–Hückel equation and Debye–Hückel limiting law. The activity is only proportional to the concentration and is altered by a factor known as the activity coefficient . This factor takes into account the interaction energy of ions in solution.

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rdfs:label	Ecuación de Debye-Hückel (es) Debye–Hückel equation (en) Equazione di Debye-Hückel (it) デバイ-ヒュッケルの式 (ja) Rozszerzone prawo Debye’a-Hückla (pl)
rdfs:comment	The chemists Peter Debye and Erich Hückel noticed that solutions that contain ionic solutes do not behave ideally even at very low concentrations. So, while the concentration of the solutes is fundamental to the calculation of the dynamics of a solution, they theorized that an extra factor that they termed gamma is necessary to the calculation of the activity coefficients of the solution. Hence they developed the Debye–Hückel equation and Debye–Hückel limiting law. The activity is only proportional to the concentration and is altered by a factor known as the activity coefficient . This factor takes into account the interaction energy of ions in solution. (en) デバイ-ヒュッケルの式は電解液の中のイオンの相互作用を統計力学的に解析したものである。ピーター・デバイとエーリヒ・ヒュッケルの名前にちなんでいる。電解液全体で電気的中性の条件が成り立っていることと、各イオンが統計的に分布することを仮定する。 (ja) La ecuación de Debye-Hückel es un modelo que describe una mezcla de iones (electrolitos), inmersos en un medio dieléctrico continuo de temperatura T, presión P y concentración molar , en donde los iones de diferente tipo se denotan como i. (es) I chimici Peter Debye ed Erich Hückel condussero studi sulle soluzioni che contengono soluti ionici e notarono un comportamento non ideale anche a concentrazioni molto basse. Quindi, mentre la concentrazione dei soluti è fondamentale per il calcolo della dinamica di una soluzione, essi teorizzarono un fattore aggiuntivo detto gamma per il calcolo del coefficiente di attività di un certo tipo di ione in soluzione. Questo porta a due equazioni: quella formulata da Debye–Hückel detta anche 'equazione di Debye–Hückel limitata o legge limite di Debye–Hückel e quella modificata empiricamente detta 'equazione di Debye–Hückel estesa. L'attività è solo proporzionale alla concentrazione e viene alterata tramite un fattore noto come coefficiente di attività . Tale fattore tiene conto dell'energia di (it) Rozszerzone prawo Debye’a-Hückla – równanie opisujące współczynniki aktywności jonów w roztworze. Jest ono spełnione gdy siła jonowa (a więc i stężenie) analizowanych indywiduów chemicznych są względnie małe (< 0,01): dla dużych stężeń często dodaje się jeszcze jeden człon: – średni współczynnik aktywności jonów, – ładunki kationu i anionu wyrażone w jednostkach ładunku elementarnego, – siła jonowa roztworu, – średni promień uwodnionego jonu, np. dla jonu Na+ przyjmuje się 450 pm, – stała (dla roztworów wodnych w temperaturze 298 K równa jest 0{,}509), gdzie: (pl)
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dcterms:subject	Electrochemical equations Peter Debye Analytical chemistry
Wikipage page ID	2077027 (xsd:integer)
Wikipage revision ID	1100826464 (xsd:integer)
Link from a Wikipage to another Wikipage	Potassium chloride Pressure Electric potential Electrostatics Boltzmann constant Electrochemical equations Peter Debye Charge number Volume Debye length Debye–Hückel theory Interaction energy Activity (chemistry) Thermodynamic potential Thomas Hakon Gronwall Common logarithm Electric potential energy Electrical double layer Elementary charge Entropy Free variables and bound variables Gibbs free energy Multiplication Concentration Equilibrium constant Osmotic pressure Angstrom Stoichiometric coefficient Helmholtz free energy Ideal solution Pitzer equations Micelle Avogadro constant Activity coefficient Ion Ionic atmosphere Ionic strength Peter Debye Erich Hückel Number density Helmholtz equation Temperature Analytical chemistry Charge density Chemical equilibrium Physikalische Zeitschrift Strong electrolyte Relative permittivity Boltzmann distribution Boltzmann factor Spherical coordinates Free entropy Internal energy Buckingham π theorem Molality Thermal equilibrium Differential (infinitesimal) Poisson–Boltzmann equation Linear superposition Surfactant Osmotic coefficient Mole fraction Shell theorem Point charge Inverse length Boltzmann statistics Cgs units Taylor series expansion

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