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Multiple Choice
Which of the following statements is true regarding the strength of acids and bases?
A
A strong acid completely dissociates in water.
B
A weak base completely dissociates in water.
C
A weak acid completely dissociates in water.
D
A strong base partially dissociates in water.
Verified step by step guidance
1
Understand the concept of acid and base dissociation: In chemistry, dissociation refers to the process by which molecules or ionic compounds split into smaller particles, such as atoms, ions, or radicals, usually in a reversible manner.
Define strong acids and bases: A strong acid is one that completely dissociates in water, meaning it releases all of its hydrogen ions (H⁺) into the solution. Similarly, a strong base completely dissociates in water, releasing all of its hydroxide ions (OH⁻).
Define weak acids and bases: A weak acid only partially dissociates in water, meaning it releases only some of its hydrogen ions into the solution. A weak base also partially dissociates, releasing only some of its hydroxide ions.
Evaluate the given statements: Compare each statement to the definitions of strong and weak acids and bases. A strong acid completely dissociates in water, which matches the definition. A weak base does not completely dissociate, so that statement is false. A weak acid does not completely dissociate, so that statement is false. A strong base does not partially dissociate, so that statement is false.
Conclude which statement is true: Based on the definitions and evaluation, the statement 'A strong acid completely dissociates in water' is true.