'Activity coefficients' diaporamas de présentation

Chemistry 232

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Redox Geochemistry

Redox Geochemistry. WHY?. Redox gradients drive life processes! The transfer of electrons between oxidants and reactants is harnessed as the battery, the source of metabolic energy for organisms

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Water Binding to Ions

Chapter 7 Activity and the Systematic Treatment of Equilibrium. Water Binding to Ions. Equilibrium Constants with Concentrations and Activities. Fe 3+ + SCN - = Fe(SCN) 2+. Pale yellow. Colorless. Red. 7-1 The Effect of Ionic Strength on Solubility of Salts.

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CHAPTER 07: ACTIVITY AND THE SYSTEMATIC TREATMENT OF EQUILIBRIUM

Harris: Quantitative Chemical Analysis, Eight Edition. CHAPTER 07: ACTIVITY AND THE SYSTEMATIC TREATMENT OF EQUILIBRIUM. Ionic and hydrated radii of several ions. Water Binding to Ions. Equilibrium Constants with Concentrations and Activities. Fe 3+ + SCN - = Fe(SCN) 2+. Pale yellow.

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7. Excess Gibbs Energy Models

7. Excess Gibbs Energy Models. Practicing engineers find most of the liquid-phase information needed for equilibrium calculations in the form of excess Gibbs Energy models. These models: reduce vast quantities of experimental data into a few empirical parameters,

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ACTIVITY

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7. Liquid Phase Properties from VLE Data (11.1)

7. Liquid Phase Properties from VLE Data (11.1). The fugacity of non-ideal liquid solutions is defined as: (10.42) from which we derive the concept of an activity coefficient: (10.89)

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Acid-base equilibria

Acid-base equilibria. Chemistry 321, Summer 2014. Goals of this lecture. Quantify acids and bases as analytes Measure [H + ] in solution ? pH Control/stabilize [H + ] in solution ? buffers Predict/control the form of acid or base in solution ? ligands.

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Chapter 10

Chapter 10. Effect of Electrolytes on Chemical Equilibria. The equilibrium constants for chemical reactions should be written in terms of the activities of the participating species. The activity of a species is related to its concentration by a factor called the activity coefficient.

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Electrolyte Solutions

Electrolyte Solutions. Marshall Rafal and James W. Berthold Noel C. Scrivner and Steven L. Grise 2001 - 4 - 13 Lee , Yun Mi. Contents. Aqueous chemistry introduction, definition Phase equilibruim predictive model Thermodynamics properties, data source, activity models .

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Example

Example 25 mL of 0.100 M AgNO 3 are mixed with 35 mL of 0.050 M K 2 CrO 4 . Find the concentration of each ion in solution at equilibrium if k sp of Ag 2 CrO 4 = 1.1x10 -12 . Solution 2 Ag 2+ + CrO 4 2- g Ag 2 CrO 4(s) mmol Ag + = 0.100 x 25 = 2.5 mmol CrO 4 2- = 0.050 x 35 = 1.75

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CHAPTER 10 EFFECT OF ELECTROLYTES ON CHEMICAL EQUILIBRIA

CHAPTER 10 EFFECT OF ELECTROLYTES ON CHEMICAL EQUILIBRIA. The position of most solution equilibria depends on the electrolyte concentration of the medium, even when the added electrolyte contains no ion in common with those involved in the equilibrium.

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Chapter 9

Jess Sproul Chapter 9 Notes. Chapter 9. Electrolyte Effects: Activity or Concentration. 9A-1: How Do Ionic Charges Affect Equilibria?. The magnitude of the effect that the electrolyte has is highly dependent on the charge of the ions participating in the equilibrium.

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Liquid Solutions

Liquid Solutions. Purpose of this lecture : To introduce the activity coefficient, a partial molar property of chemical species in non-ideal solutions. Highlights

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Excess Gibbs Energy Models

Excess Gibbs Energy Models. Purpose of this lecture : To introduce some popular empirical models (Margules, van Laar) that can be used for activity coefficients in binary mixtures Highlights

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Enter your fluid composition on the Basis pane.

Enter your fluid composition on the Basis pane. Swap in gases of known fugacity. O 2 (g) is swapped in for O 2 (aq) and the combination of CO 2 (g) and HCO 3 ? constrain pH. Go to the Results pane, click Run, then view printed or plotted results.

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