Which of the following is correct about 1.0 x 10^-3 M HCl solution & 1.0 x 10^5 M HClO4 solution
Correct answer: B. HCl solution is 100 times more acidic than HClO4 solution
- A. HCl solution is less acidic than HClO4 solution
- B. HCl solution is 100 times more acidic than HClO4 solution
- C. HClO4 is 100 times more acidic than HCl solution
- D. Not predictable
Explanation
The acidity of a solution is determined by the concentration of hydrogen ions (H+). The concentration of H+ ions from 1.0 × 10-3 M HCl is higher than that from 1.0 × 105 M HClO4. Therefore, the HCl solution is 100 times more acidic than the HClO4 solution. The other options are incorrect as they misinterpret the concentration values or suggest unpredictability, which is not the case here.
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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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