Multiple Choice
In the context of acid-base reactions, how is a controlled variable different from a responding variable?
3. Acids and Bases
Acids and Bases
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Which of the following is a characteristic of a strong acid in aqueous solution?
A
It partially dissociates into ions.
B
It has a high pH value.
C
It forms a weak conjugate base.
D
It completely dissociates into ions.
Verified step by step guidance1
Understand the concept of acid dissociation: In aqueous solutions, acids can dissociate into ions. The extent of this dissociation is a key characteristic of acid strength.
Define strong acids: Strong acids are those that completely dissociate into ions in aqueous solutions. This means that nearly all the acid molecules break apart into hydrogen ions (H⁺) and their corresponding anions.
Contrast with weak acids: Weak acids only partially dissociate in solution, meaning that a significant portion of the acid remains in its molecular form.
Consider the pH value: Strong acids typically result in a low pH value because they increase the concentration of hydrogen ions in the solution.
Identify the conjugate base: A strong acid forms a weak conjugate base because the complete dissociation leaves little tendency for the conjugate base to re-associate with hydrogen ions.
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