Which of the following solution have zero pH
Correct answer: A. 1M HCl
- A. 1M HCl
- B. 1M HF
- C. 1M HNO3
- D. 1M CH3COOH
Explanation
The correct answer is 1M HCl. Hydrochloric acid (HCl) is a strong acid that completely dissociates in water, resulting in a high concentration of hydrogen ions (H+), which can cause the pH to approach zero. Other options like 1M HF and 1M CH3COOH are weak acids and do not fully dissociate, leading to higher pH levels. While 1M HNO3 is a strong acid and also has a low pH, its pH is typically higher than zero but very close. Therefore, 1M HCl is the most suitable option for having a pH of zero.
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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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