Equilibrium constant expressions for

The equilibrium position for any reaction is defined by a fixed equilibrium constant, not by a fixed combination of concentrations for the reactants and products. This is easily appreciated by examining the equilibrium constant expression for the dissociation of acetic acid. 

Substituting equations 6.39 and 6.40 into the equilibrium constant expression for the dissociation of HE (equation 6.35) and solving for the concentration of H3O4 gives us... 

Write equilibrium constant expressions for the following reactions. Determine the value for the equilibrium constant for each reaction using appropriate equilibrium constants from Appendix 3. 

Substituting the equilibrium constant expressions for reactions 8.3-8.S into equation 8.6 defines the solubility of AgCl in terms of the equilibrium concentration of Ch. 

Starting with the equilibrium constant expressions for reactions 8.1, and 8.3-8.5, verify that equation 8.7 is correct. 

The change in the concentration of H3O+ is monitored with a pH ion-selective electrode, for which the cell potential is given by equation 11.9. The relationship between the concentration of H3O+ and CO2 is given by rearranging the equilibrium constant expression for reaction 11.10 thus... 

Applying the reciprocal rule (page 327), we can deduce the equilibrium constant expression for the reverse reaction... 

Recall (page 331, Chapter 12) that in the equilibrium constant expression for reactions in solution—... 

The equilibrium constant expression for the dissolving of SrCr04 can be written following the rules in Chapters 12 and 13. In particular, the solid does not appear in the expression the concentration of each ion is raised to a power equal to its coefficient in the chemical equation. 

A corollary of this rule has us note that the orders in the rate law [Eq. (6-26)] are lower than those in the equilibrium constant expression for Eq. (6-25). This signals that an intermediate is produced but rapidly consumed. 

C16-0002. Write the equilibrium constant expression for the conversion of molecular oxygen into ozone, O2 O3 (unbalanced). 

Chemical equilibria often involve pure liquids and solids in addition to gases and solutes. The concentration of a pure liquid or solid does not vary significantly. Figure 16-4 shows that although the amount of a solid or liquid can vary, the number of moles per unit volume remains fixed. In other words, the concentrations of pure liquids or solids are always equal to their standard concentrations. Thus, division by standard concentration results in a value of 1 for any pure liquid or solid. This allows us to omit pure liquids and solids from equilibrium constant expressions. For a general reaction (2A + iBt= C D-l-. S where S is a pure solid or liquid ... 

Write the equilibrium constant expression for the reaction of iron metal with strong aqueous acid, and indicate the concentration units for each reagent ... 

This is the equation (or equations) that we must use to complete the calculations. The equilibrium constant expression for LiF dissolving in water is. eq [Li" ]eq [F ]gg... 

C16-0055. Write each of the chemical reactions of Problem in the opposite direction and determine the equilibrium constant expressions for these reactions. 

C16-0105. Write the equilibrium reaction and equilibrium constant expression for each of the following processes (a) Trimethylamine, (CH3)3 N, a weak base, is added to water, (b) Hydrofluoric acid, HF, a weak acid, is added to water, (c) Solid calcium sulfate, CaSOq, a sparingly soluble salt, is added to water. 

C16-0115. Consider the following reaction CO2 (g) + 2 OH (c2 g) C03 (a equilibrium constant expression for this reaction, (b) What will happen to the pressure of CO2 in this equilibrium system if some Na2 CO3 solid is dissolved in the solution (c) What will happen to the pressure of CO2 in this equilibrium system if some HCl gas is bubbled through the solution ... 

We can write an equilibrium constant expression for each equilibrium. Because the initial calculations involve the dominant equilibrium, we start with the expression for 1 ... 

The equilibrium constant expression for this equilibrium is related to for acetic acid ... 

C18-0137. The graph shows the titration curve for a solution of formic acid, which is a principal component in the venom of stinging ants. Identify the major species in the solution at equilibrium, identify the dominant equilibrium, and write the equilibrium constant expression for points A, B, C, and D on the curve. 

Write an equilibrium constant expression for each of the following ... 

The next step in the procedure for calculating the stability constants is to represent the concentrations of the several complexes in terms of the equilibrium constants for their formation. We do this by solving each equilibrium constant expression for the concentration of the complex. For example, the first step has an equilibrium constant... 

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