Multiple Choice
Which statement is true regarding the Brønsted-Lowry theory of acids and bases?
3. Acids and Bases
Acids and Bases
Multiple Choice
Which of the following statements is incorrect regarding the strength of acids and bases?
A
Strong acids completely dissociate in water.
B
The pH of a strong acid is higher than that of a weak acid.
C
The strength of an acid is determined by its ability to donate protons.
D
Weak bases partially dissociate in water.
Verified step by step guidance1
Understand the concept of acid and base strength: Acid strength is determined by the degree of dissociation in water. Strong acids completely dissociate, while weak acids only partially dissociate.
Review the pH scale: pH is a measure of the hydrogen ion concentration in a solution. Strong acids, which dissociate completely, result in a higher concentration of hydrogen ions and thus a lower pH compared to weak acids.
Analyze the statement about strong acids: 'Strong acids completely dissociate in water' is correct because strong acids like HCl dissociate fully, releasing more hydrogen ions.
Evaluate the statement about pH: 'The pH of a strong acid is higher than that of a weak acid' is incorrect. Since strong acids have more hydrogen ions, they have a lower pH than weak acids.
Consider the statement about weak bases: 'Weak bases partially dissociate in water' is correct because weak bases like NH₃ do not fully dissociate, resulting in fewer hydroxide ions in solution.
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