Waiting
Login processing...

Trial ends in Request Full Access Tell Your Colleague About Jove
Équilibre dynamique
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions.…
La constante d'équilibre
Consider the oxidation of sulfur dioxide: For a reaction that begins with a mixture of reactants only, the product concentration is initially equal…
Équilibres pour des réactions gazeuses et des réactions hétérogènes
Homogeneous Equilibria for Gaseous Reactions For gas-phase reactions, the equilibrium constant may be expressed in terms of either the molar…
Calculer la constante d'équilibre
The equilibrium constant for a reaction is calculated from the equilibrium concentrations (or pressures) of its reactants and products. If these…
Quotient réactionnel
The status of a reversible reaction is conveniently assessed by evaluating its reaction quotient (Q). For a reversible reaction described by m A + n…
Calculer les concentrations à l'équilibre
Being able to calculate equilibrium concentrations is essential to many areas of science and technology—for example, in the formulation and…
La supposition d'un x petit
If a reaction has a small equilibrium constant, the equilibrium position favors the reactants. In such reactions, a negligible change in…
Principe de Le Chatelier : modifications de la concentration
A system at equilibrium is in a state of dynamic balance, with forward and reverse reactions taking place at equal rates. If an equilibrium system is…
Principe de Le Chatelier : modifications du volume (pression)
For gas-phase equilibria, changes in the concentrations of reactants and products can occur with altered volume and pressure. The partial pressure,…
Principe de Le Chatelier : modifications de la température
Consistent with the law of mass action, an equilibrium stressed by a change in concentration will shift to re-establish equilibrium without any…
Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
Estimates of the primitive upper mantle (PUM) composition reveal a depletion in many of the siderophile (iron-loving) elements, thought to result…
Computation of Atmospheric Concentrations of Molecular Clusters from <em>ab initio</em> Thermochemistry
The computational study of the formation and growth of atmospheric aerosols requires an accurate Gibbs free energy surface, which can be obtained…
Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Streams such as urine and manure can contain high levels of ammonium, which could be recovered for reuse in agriculture or chemistry. The extraction…

Get cutting-edge science videos from JoVE sent straight to your inbox every month.

Waiting X
Simple Hit Counter