CHEMCO Exit Exam • Set 15 Question 5 of 30

Which statement does not describe a property of a weak acid in solution?

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Direct Answer

Option B: It has a pH of between 8 and 9.

Weak acids, by definition, partially dissociate in solution, yielding hydrogen ions and thus maintaining a pH below 7. A pH between 8 and 9 indicates a basic (alkaline) solution, not an acidic one, regardless of its strength, a core chemical principle.

All Options

It forms a salt with sodium hydroxide.

It has a pH of between 8 and 9. (Correct Answer)

It is only partly dissociated into ions.

It reacts with sodium carbonate to give off carbon dioxide.

Detailed Explanation & Context

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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