Which of the following solutions has a pH of zero?
Correct answer: A. 1 M HCl
- A. 1 M HCl
- B. 1 M HF
- C. 1 M HNO₃
- D. 1 M CH₃COOH
Explanation
A pH of zero corresponds to a hydrogen ion concentration of [H⁺] = 10⁰ = 1 M. Since HCl is a strong acid, a 1 M HCl solution will fully dissociate to produce a [H⁺] of 1 M.
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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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