Equivalence point' in an acid base titration is defined as that point where equivalents of acid
Channel: Doubtnut
Date: 2020-04-19

Equivalence point' in an acid base titration is defined as that point where equivalents of acid become equal to equivalents of base.In case of monoprotic acids and bases there is a single equivalence point, whereas in case of polyprotic acids and bases there may be multiple equivalnece  points. Depending upon the type of suybstances present, pH of the soution can be calculated at nay equivalence point.   given that:  ` Ka_(1),H_(3)PO_(4)=5xx10^(-4)`   `Ka_(2), H_(3)PO=5xx10^(-8)`   `Ka_(3),H_(3)PO_(4)=4.5xx10^(-11)   (Use: log 2 = 0.3, log 3 =0.4)`   The pH of the solution when 100 ml of 0.1 M NaOH solution at 298 K Is: