
Concept explainers
(a)
Interpretation:
Concept introduction:
pH definition:
The concentration of hydrogen ion is measured using
The
Acid ionization constant
The equilibrium expression for the reaction
Where
Base ionization constant
The equilibrium expression for the ionization of weak base
Where
Relationship between
(a)

Answer to Problem 19.56P
The pH of a solution made by mixing
Explanation of Solution
Given,
The balance equation is given below,
The nitrate ions on the product side are written as separate spices because they have no effect on
Calculate the required volume of
Volume
Therefore, the required volume of
Determination the moles of
Determination the liters of solution present at the equivalent point,
Volume
Concentration of
Molarity,
Calculate
The equilibrium value for
Determination the hydrogen ion concentration from the
Calculation for
Therefore, the volume of
(b)
Interpretation:
The
Concept introduction:
pH definition:
The concentration of hydrogen ion is measured using
The
Acid ionization constant
The equilibrium expression for the reaction
Where
Base ionization constant
The equilibrium expression for the ionization of weak base
Where
Relationship between
(b)

Answer to Problem 19.56P
The pH of a solution made by mixing
The second equivalent pH of a given buffer solution after the addition of
Explanation of Solution
The balance equation is given below,
The nitrate ions on the product side are written as separate spices because they have no effect on the
Calculate the volume of
Volume of
The solution requires an equal volume to reach second equivalence point
Determination the moles of
An equal number of moles of
Determination the liters of solution at the first equilibrium point:
Volume
Determination the liters of solution at the second equilibrium point:
Volume
Concentration of
Molarity,
Concentration of
Molarity,
Calculate
The equilibrium value for
Next calculate
The equilibrium value for
Determination the hydrogen ion concentration from the
Calculation for first equilibrium point:
Calculation for
Determination the hydrogen ion concentration from
Calculation for second equilibrium point:
Calculation for
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Chapter 19 Solutions
Chemistry: The Molecular Nature of Matter and Change
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