The pKa values of 4 acids are given below. Acid              HA1            HA2          HA3          HA4 pKa                4.76           3.45          7.63          5.23 Which of the following solutions does have the highest pH? Choose one option only. Options: a. 0.30 M A2- (aq) (conjugate base of HA2) b. 0.30 M A3- (aq) (conjugate base of HA3) c. 0.30 M A1- (aq) (conjugate base of HA1) d. 0.30 M A4- (aq) (conjugate base of HA4) e. All the 0.30 M bases in this question have the same solution pH.

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