
Concept explainers
(a)
Interpretation:
The concentration of hydrogen ions in lemon juice should be predicted.
Concept introduction:
The full form of pH is the potential of pH. In other words, it explains the strength of the hydrogen ion in the solution. It is given by the formula,

Answer to Problem SIV4RE
The concentration of hydrogen ions in lemon juice is 0.01 M.
Explanation of Solution
The pH of the lemon juice is given as 2. The concentration of hydrogen ions in lemon juice is calculated as follows:
Therefore, the concentration of hydrogen ions in lemon juice is 0.01 M.
(b)
Interpretation:
The concentration of hydroxide ions in lemon juice should be predicted.
Concept introduction:
The full form of pH is the potential of pH. In other words, it explains the strength of the hydrogen ion in the solution. It is given by the formula,
Now, the concentration of hydroxide ions can be calculated using hydrogen ion as follows:

Answer to Problem SIV4RE
The concentration of hydroxide ions in lemon juice is
Explanation of Solution
The pH of the lemon juice is given as 2. The concentration of hydrogen ions in lemon juice is 0.01 M.
The concentration of hydroxide ions in lemon juice is calculated as follows:
Therefore, the concentration of hydroxide ions in lemon juice is
Chapter U4 Solutions
Living By Chemistry: First Edition Textbook
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