Paper 3 · November 2009 · acid strength
Which of the following is the weakest acid in aqueous solution?
AHF
BHCl
CHBr
DHI
Explanation
The marking scheme gives answer A. HF is the weakest acid among the hydrogen halides because the H-F bond is the strongest (shortest bond length, highest bond energy), making it less easy to dissociate.
ZIMSEC Chemistry Paper 3, November 2009, Q10