Question

61. The graphs labeled (a) and (b) show the titration curves for two equal-volume samples of monoprotic acids, one weak and one strong. Both titrations were carried out with the same concen- tration of strong base. pH pH pH TTTTTTT NO TTTTTTT 0 0 20 40 60 80 100 Volume of base added (mL) = 0 20 40 60 80 100 Volume of base added (mL) (b) (i) What is the approximate pH at the equivalence point of each curve? (ii) Which graph corresponds to the titration of the strong acid and which one to the titration of the weak acid?