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Multiple Choice
Which of the following is a characteristic of a strong acid in aqueous solution?
A
It completely dissociates into ions.
B
It partially dissociates into ions.
C
It has a high pH value.
D
It forms a weak conjugate base.
Verified step by step guidance
1
Understand the concept of acid dissociation: A strong acid is one that completely dissociates into its ions in an aqueous solution. This means that when a strong acid is dissolved in water, it releases all of its hydrogen ions (H⁺) into the solution.
Consider the definition of a strong acid: In chemistry, a strong acid is defined by its ability to fully dissociate in water, resulting in a high concentration of hydrogen ions. This is in contrast to weak acids, which only partially dissociate.
Evaluate the options given: The characteristic of a strong acid is that it completely dissociates into ions. This is the key feature that distinguishes strong acids from weak acids.
Analyze the pH value: Strong acids typically have a low pH value because the concentration of hydrogen ions is high. A high pH value would indicate a basic solution, not an acidic one.
Consider the conjugate base: A strong acid forms a weak conjugate base because the acid has donated its proton completely, leaving behind a base that is less likely to accept a proton back.