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EE 12% Fri 1:37 AM Q. 03 Chrome File Edit View History Bookmarks People Window Help Mastering Chemistry: CH 14 HW https:// session. masteringchemistry.com /myct/ emView? assignment ProblemID 77486250 t Relating pKa and pKb Resou Ces previous l 4 of 6 l next pKa 3.66 pKa and pKb Submit Hints My Answers Give Up Review Part oal: Correct land the relation between the strength of a base and its pKa and pKb values. Significant Figures Feedback: Youranswer 3.658 was either rounded differently or used a different number of significant figures than required for this part. e to which a weak acid dissociates in given by its acid ionization constant, generic weak acid, HA, Conjugate pairs A(aq) A (aq) +H (aq) d-ionization constant is given by At 25°C, for any conjugate acid-base pair pKa pKb 14.00 he degree to which a weak base reacts in solution is given by its base-lonization Part B b. For the generic weak base, B, What is pKb of the conjugate base of X-281? (Assume 25 C.) H2O(l) BH (aq) +OH (aq) Express your answer numerically. se-ionization constant is given by BH i OH pKb Submit Hints My Answers Give Up Review Part nswe

Explanation / Answer

at 25 deg

Pka + PKb = 14 ,

given PKa= 3.66 form part A

PKb = 14-PKa = 14-3.66 = 10.34

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