
Concept explainers
(a)
Interpretation:
The change in the concentration of hydrogen ions is to be calculated.
Concept introduction:
The concentration of hydrogen ion is calculated by the value of

Answer to Problem 20.53E
The change in the hydrogen ion concentration is
Explanation of Solution
The concentration of hydrogen ions in a solution is calculated by the following formula.
It is given that the initial
Substitute the value of initial
Therefore, the initial concentration of hydrogen ions are
It is given that the
Substitute the value of initial
Therefore, the final concentration of hydrogen ions are
The change in the concentration of hydrogen ion is calculated by the following formula.
The initial concentration of hydrogen ions are
The final concentration of hydrogen ions are
Substitute the value of initial and final concentration of hydrogen ions in the above equation.
Therefore, the change in the hydrogen ion concentration is
The change in the hydrogen ion concentration is
(b)
Interpretation:
The number of molecules of substrate reacted to cause the change in hydrogen ion concentration is to be calculated.
Concept introduction:
The concentration of hydrogen ion is calculated by the value of

Answer to Problem 20.53E
The number of molecules of substrate reacted to cause the change in hydrogen ion concentration is
Explanation of Solution
The number of molecules of substrate reacted to cause the change in hydrogen ion concentration is calculated by the following formula.
Where,
•
The value of
The change in the hydrogen ion concentration is
Substitute the value of hydrogen ion concentration and Avogadro number in equation (2).
Therefore, the number of molecules of substrate reacted to cause the change in hydrogen ion concentration is
The number of molecules of substrate reacted to cause the change in hydrogen ion concentration is
(c)
Interpretation:
The turnover number of enzyme is to be calculated.
Concept introduction:
Enzymes are the biocatalysts. Enzyme enhances the activity of biochemical process. For increasing the

Answer to Problem 20.53E
The turnover number of enzyme is
Explanation of Solution
The turnover number is calculated by the following formula.
The number of molecules of substrate reacted is
It is given that the time of reaction is
Substitute the value of time and number of molecules reacted in equation (3).
Therefore, the turnover number of enzyme is
The turnover number of enzyme is
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Chapter 20 Solutions
Study Guide with Student Solutions Manual for Seager/Slabaugh/Hansen's Chemistry for Today: General, Organic, and Biochemistry, 9th Edition
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