(a)
Interpretation: The hydroxide ion concentration of a solution with pH value 7.0 needs to be determined.
Concept Introduction: The pH of the solution is negative log of hydronium ion in the solution. It is related to pOH of the solution as follows:
Now, pOH is negative log of hydroxide ions in the solution thus, it is represented as follows:
Here,
(a)
Explanation of Solution
The given solution has pH value 7.0. The pOH can be calculated as follows:
Or,
Now, from pOH the concentration of hydroxide ions can be calculated as follows:
Substitute the values,
Therefore, the concentration of hydroxide ions will be
(b)
Interpretation: The hydroxide ion concentration of a solution with pH value 4.0 needs to be determined.
Concept Introduction: The pH of the solution is negative log of hydronium ion in the solution. It is related to pOH of the solution as follows:
Now, pOH is negative log of hydroxide ions in the solution thus, it is represented as follows:
Here,
(b)
Explanation of Solution
The given solution has pH value 4.0. The pOH can be calculated as follows:
Or,
Now, from pOH the concentration of hydroxide ions can be calculated as follows:
Substitute the values,
Therefore, the concentration of hydroxide ions will be
(c)
Interpretation: The hydroxide ion concentration of a solution with pH value 9.0 needs to be determined.
Concept Introduction: The pH of the solution is negative log of hydronium ion in the solution. It is related to pOH of the solution as follows:
Now, pOH is negative log of hydroxide ions in the solution thus, it is represented as follows:
Here,
(c)
Explanation of Solution
The given solution has pH value 9.0. The pOH can be calculated as follows:
Or,
Now, from pOH the concentration of hydroxide ions can be calculated as follows:
Substitute the values,
Therefore, the concentration of hydroxide ions will be
Chapter 21 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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