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The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.32....

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Question

Chemistry

The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 =7.32. Calculate the pH at each of the following points in thetitration of 50.0 mL of a 0.80 M B(aq) with 0.80 M HCl(aq).

(a) before addition of any HCl

(b) after addition of 25.0 mL of HCl

(c) after addition of 50.0 mL of HCl

(d) after addition of 75.0 mL of HCl

(e) after addition of 100.0 mL of HCl

Answer & Explanation Solved by verified expert
4.2 Ratings (581 Votes)
a initially when there is no HCl B H2O BH OH Kb1 BHOHB Kb1 10pKb1 1021 0007943 794103 assume in equilibrium due to stoichiometry BH OH x B Mx 794103 xx08x solve for x x 0075828 OH 0075828 no need to    See Answer
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