Chemistry Practice Problems Ka and Kb Practice Problems Solution: Which of the following will have the weakest conju...

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Solution: Which of the following will have the weakest conjugate base? A. Hydrocyanic acid, HCN (Ka = 4.9 x 10-10)  B. Benzoic acid, HC7H5O2  (Ka = 6.5 x 10-5​)  C. Hypochlorous acid, HCIO (Ka = 2.9 x 10-8​)  D. Phenol, HC6H5O (Ka = 1.3 x 10-10​)  E. Cyanic acid, HCNO (Ka = 2.0 x 10-4​) 

Problem

Which of the following will have the weakest conjugate base?

A. Hydrocyanic acid, HCN (Ka = 4.9 x 10-10
B. Benzoic acid, HC7H5O (Ka = 6.5 x 10-5​) 
C. Hypochlorous acid, HCIO (Ka = 2.9 x 10-8​) 
D. Phenol, HC6H5O (Ka = 1.3 x 10-10​) 
E. Cyanic acid, HCNO (Ka = 2.0 x 10-4​)