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Multiple Choice
Which of the following is not a characteristic of a strong acid?
A
Has a high pKa value
B
Completely dissociates in water
C
Has a low pH value
D
Produces a high concentration of H+ ions
Verified step by step guidance
1
Understand the concept of a strong acid: A strong acid is one that completely dissociates in water, meaning it releases all of its hydrogen ions (H+) into the solution.
Review the relationship between pKa and acid strength: The pKa value is a measure of the acidity of a substance. A lower pKa value indicates a stronger acid because it implies a greater tendency to donate protons.
Consider the pH value: Strong acids typically have low pH values because they produce a high concentration of H+ ions, which lowers the pH of the solution.
Evaluate the dissociation in water: Strong acids completely dissociate in water, meaning they do not remain in their molecular form but instead exist entirely as ions.
Identify the characteristic that does not fit: A high pKa value is not characteristic of a strong acid, as strong acids have low pKa values due to their complete dissociation and high proton donation ability.