What is pKb of the conjugatebase of X-281? (Assume 25 ?C.) Express your answer numerically.

* Relating pKa and pKb Learning Goal: To understand the relation between the strength of an acid or a base and its pKa and pKb values. T hg degree to Which a Weak acid dissociates in solution is given by its acid-ion,'zaon constant. K,. For the generic weak acid, HA(aq) (aq) + H + (aq) and the aCld-ionizatiO.n Constant iS given by IA-IIH-I Similany. the degree to which a weak base reacts with H20 in solution given by its base-ionization constant. For the weak B, B(aq) + BH-(aq) + OH- (aq) and thg bag-ionization ig givgn by O) Review I Constants I Periodic Table pKa - 496 Conjugate pairs At 2S 'C. tor any conjugate acid-base pair Part B pKa + pKb 14.00 What is Ofthg Of 25" C.) Express your mswer numerica"y. View Available Hint(S) pKb- 9.68 Submit X Incorrect; Try Again; 3 attempts