Which statement best represents Davy's definition of an acid?
(A) Acids contain oxygen - HSC - SSCE Chemistry - Question 5 - 2004 - Paper 1
Question 5
Which statement best represents Davy's definition of an acid?
(A) Acids contain oxygen.
(B) Acids are proton donors.
(C) Acids contain replaceable hydrogen.
(D) ... show full transcript
Worked Solution & Example Answer:Which statement best represents Davy's definition of an acid?
(A) Acids contain oxygen - HSC - SSCE Chemistry - Question 5 - 2004 - Paper 1
Step 1
Identify Davy's Definition of an Acid
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Answer
Davy defined acids largely in terms of their chemical behavior, particularly focusing on the presence of hydrogen. The key aspect of this definition is that acids consist of replaceable hydrogen which can be ionized in solution.
Step 2
Evaluate the Options
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Answer
Let's analyze each of the options:
(A) Acids contain oxygen.
This is not true for all acids, as there are many acids that do not contain oxygen.
(B) Acids are proton donors.
This is a common definition, but it aligns more with the Brønsted-Lowry theory rather than Davy’s perspective.
(C) Acids contain replaceable hydrogen.
This statement directly reflects Davy's view on acids, emphasizing the role of hydrogen.
(D) Acids ionise in solution to form hydrogen ions.
While true, this option elaborates on the behavior of acids but does not encapsulate Davy's definition.
Step 3
Conclusion
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Answer
Based on the evaluation, the statement that best aligns with Davy's definition of an acid is:
(C) Acids contain replaceable hydrogen.
