Consider theKavalues for the following acids:Consider theKavalues for the follow

Question

Consider theKavalues for the following acids:Consider theKavalues for the following acids: Cyanic acid, HOCN, 3.5×10–4Formic acid, HCHO2, 1.7×10–4Lactic acid, HC3H5O3, 1.3×10–4Propionic acid, HC3H5O2, 1.3×10–5Benzoic acid, HC7H5O2, 6.3×10–5Cyanic acid, HOCN, 3.5×10–4Formic acid, HCHO2, 1.7×10–4Lactic acid, HC3H5O3, 1.3×10–4Propionic acid, HC3H5O2, 1.3×10–5Benzoic acid, HC7H5O2, 6.3×10–5 Which has the weakest conjugate base?Which has the weakest conjugate base?

Select one:

a. propionic acid

b. benzoic acid

c. lactic acid

d. formic acid

e. Cyanic acid

Explanation / Answer

weakest conjugate base will be for strongest acid

Strongest acid is the one greatest Ka
So, strongest acid is HOCN
So, cyanic acid will be weakest conjugate base
Answer: e

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