(a)
Interpretation:
The equilibria and charge and mass balances needed to find the composition of
Concept introduction:
Charge balance:
The overall positive charges in solution equals the overall negative charges in solution.
Mass balance:
The amount of all the species in a solution containing a particular atom (or a group of atoms) must equal the amount of that atom (or group) delivered to the solution.
(a)
Explanation of Solution
Given information,
Pertinent reactions are:
Write the charge balance equation
Write the mass balance equation
(b)
Interpretation:
The concentration of species in
Concept introduction:
Charge balance:
The overall positive charges in solution equals the overall negative charges in solution.
Mass balance:
The amount of all the species in a solution containing a particular atom (or a group of atoms) must equal the amount of that atom (or group) delivered to the solution.
(b)
Explanation of Solution
Given information,
Pertinent reactions are:
Write the charge balance equation
Write the mass balance equation
First neglect activity coefficients. Make the following substitutions in the charge balance equation:
Equate the expressions for
Now substitute
We can now substitute for all terms in the charge balance using
Charge balance:
Rearrange the above equation
The spreadsheet for the calculation of species concentrations is given in figure 1
Figure 1
The concentrations are given below
The value of ionic strength is
The value of pH is
Fraction of hydrolysis
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Chapter 8 Solutions
Quantitative Chemical Analysis
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