Which compound in a 1 mol/dm3 solution has the lowest pH value?
Direct Answer
Option B: hydrogen chloride
Hydrogen chloride (HCl) is a strong acid that fully dissociates in solution, yielding a high concentration of H+ ions. In a 1 mol/dm3 solution, this results in a very low pH value, significantly lower than weak acids, neutral salts, or bases.
All Options
Detailed Explanation & Context
Hydrogen chloride (HCl) is a strong acid that fully dissociates in solution, yielding a high concentration of H+ ions. In a 1 mol/dm3 solution, this results in a very low pH value, significantly lower than weak acids, neutral salts, or bases.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
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