CHE 230 Exam 1 _Fall 2010 - Department of Chemistry - Illinois ...

The bond in HI is considerably weaker than that of HF. This is due to the poor overlap ofthe iodine (5p) orbital with the hydrogen 1s orbital. In contrast, the HF bond involves theoverlap between a (2p) orbital on fluorine and a 1s orbital on hydrogen.30. Consider the reaction below. Determine the direction that this reaction will proceed in. [(pK a ≈ 5 foracetic acid)] and [pK a ≈ 16, water (H 2 O)]. State which acid is the weaker acid and which is the strongeracid. In addition, determine the exponential magnitude of the reaction (10 x ). (40 pts total)OH 3 CCOHacetic acidpka = 5+NaOHH 3 Creaction is driven to the right side due to thedifference in pKa values. The right side is favoredby a factor of 10 11 .OCONa+ H 2 OpKa =16© 2010 Prof. S. R. Hitchcock, Department of Chemistry, Illinois State University, Normal, IL 61790-41607