Out of 1000 molecules of acetic acid are_ dissociated into ions.
Correct answer: A. 13
- A. 13
- B. 15
- C. 17
- D. 11
Explanation
Acetic acid (CH3COOH) is a weak acid, meaning it does not fully ionize in solution. Typically, only about 1-2% of acetic acid molecules dissociate into ions in water. Therefore, out of 1000 molecules, approximately 13 (1.3%) dissociate, making option A correct. Option B (15) and Option C (17) indicate a higher dissociation rate than expected for a weak acid. Option D (11) suggests a lower dissociation rate than the typical range. Hence, option A is the most accurate reflection of acetic acid's dissociation behavior.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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