<prompt> When the pH of a solution of a weak acid, HA, is equal to the pKa, the ratio of the concentrations of the salt and the acid is which one of the following?0123  <response>: The pKa is the pH at which the functional group is 50 dissociated, which in this case is the pH at which The Henderson-Hasselbalch equation, pHpKa log10, gives the relationship between these parameters. If pHpKa , log100,and1 