Identify the correct definition of basicity of an acid.

Correct Answer: The number of ionizable hydrogen atoms present in one molecule of the acid.

Subject: chemistry

• The number of OH⁻ ions it can release in solution.
• The amount of base required to dilute it.
• The number of ionizable hydrogen atoms present in one molecule of the acid.
• The pH value of the acid.

Explanation: • <b>Key Fact</b> Basicity of an acid refers to the number of replaceable (ionizable) hydrogen (H⁺) ions in one molecule. • <b>Supporting Detail</b> For example, HCl has 1 (Monobasic), H₂SO₄ has 2 (Dibasic), and H₃PO₄ has 3 (Tribasic). • <b>Related Concept</b> Non-ionizable hydrogens (like those attached to carbon in CH₃COOH) are not counted. • <b>Why wrong options are wrong</b> OH⁻ ions relate to the acidity of a base, not basicity of an acid. • <b>Exam Trick</b> Basicity = Base-neutralizing capacity of 1 molecule of Acid. • <b>Additional Info</b> Acetic acid (CH₃COOH) has 4 hydrogen atoms but only 1 is ionizable; hence it is monobasic.

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