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Related Concept Videos

Calculating the Equilibrium Constant02:46

Calculating the Equilibrium Constant

The equilibrium constant for a reaction is calculated from the equilibrium concentrations (or pressures) of its reactants and products. If these concentrations are known, the calculation simply involves their substitution into the Kc expression.
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Transition-state theory, also known as activated-complex theory, provides a molecular-level explanation of reaction rates in both gas-phase and solution-phase reactions. It extends earlier kinetic models by considering the formation of a short-lived, high-energy configuration during a reaction.The progress of a chemical reaction can be represented using a reaction profile, which plots potential energy against the reaction coordinate. As two reactant molecules approach one another, their...
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Tableau input coupled kinetic equilibrium transport (TICKET) model.

Kevin J Farley1, Kevin J Rader, Benjamin E Miller

  • 1Civil and Environmental Engineering, Manhattan College, Riverdale, New York 10471, USA. kevin.farley@manhattan.edu

Environmental Science & Technology
|March 8, 2008
PubMed
Summary
This summary is machine-generated.

The TICKET model simulates complex chemical reactions and water transport in various environments. It efficiently handles chemical speciation and reactions, proving useful for environmental and water treatment system analysis.

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Area of Science:

  • Environmental science
  • Geochemistry
  • Water resource management

Background:

  • Reactive transport modeling is crucial for understanding water systems.
  • Existing models can be complex to set up and may struggle with dynamic chemical processes.

Purpose of the Study:

  • To introduce TICKET, a versatile reactive transport model.
  • To demonstrate TICKET's capability in handling complex chemical speciation and transport.

Main Methods:

  • TICKET utilizes a tableau structure for defining equilibrium and kinetic reactions.
  • It approximates homogeneous precipitation as a solid solution to manage phase changes.
  • A one-step algorithm solves both steady-state and time-variable problems.

Main Results:

  • TICKET simulations verified the computational scheme across various test cases.
  • The model successfully examined the oxidation of Fe(II) and As(III) in a sediment column, considering sorption and dissolved oxygen.

Conclusions:

  • TICKET is a powerful, general-purpose tool for multispecies reactive transport modeling.
  • Its streamlined input and robust solution technique make it suitable for complex environmental and water treatment applications.