n/ibiscms/mod/ibis/view.php?id-4813681 Ju Sapling Learning Strong base is dissolved in 605 mL of 0.200 M weak acid (K 4.49 x10) to make a buffer with a pH of 4.00. Assume that the volume remains constant when the base is added. Halaq) + OH-(aq) H,00+A-(aq) â Calculate the pk, value of the acid and determine the number of moles of acid initially present Number Number mol HA When the reaction is complete, what is the concentration ratio of conjugate base to acid? Number HA How many moles of strong base were initially added? Number mol Hint