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Multiple Choice
Which of the following is not a characteristic of a strong acid?
A
Completely ionizes in solution
B
Donates protons easily
C
Has a high pH value
D
Has a low pKa value
Verified step by step guidance
1
Understand the concept of a strong acid: A strong acid is one that completely ionizes in solution, meaning it dissociates fully into its ions.
Recognize that strong acids donate protons easily. This is a fundamental characteristic of acids, as they are proton donors according to the Brønsted-Lowry acid definition.
Recall the relationship between pH and acidity: pH is a measure of the hydrogen ion concentration in a solution. Strong acids have a high concentration of hydrogen ions, resulting in a low pH value.
Understand the concept of pKa: pKa is the negative logarithm of the acid dissociation constant (Ka). A low pKa value indicates a strong acid, as it suggests the acid dissociates easily.
Identify the characteristic that does not fit: A high pH value is not a characteristic of a strong acid, as strong acids typically have low pH values due to their high hydrogen ion concentration.