Question 2 of 2 A diprotic base (B) has pke values of 4.32 (pKb) and 8.64...
The pKvalues for the dibasic base B are pKb = 2.10 and pKb2 = 7.77. Calculate the pH at each of the points in the titration of 50.0 mL of a 0.60 M B(aq) solution with 0.60 M HCl(aq). What is the pH before addition of any HCI? pH = 6.06 What is the pH after addition of 25.0 mL HCI? pH = What is the pH after addition of 50.0 mL HCI? pH = What is the pH after...
A weak base (B) has a pKb value of 6.84.
a) At what pH is [BH ] = [B]?
b) What is the predominant species of B at pH 5.37?
c) What is the predominant species of B at pH 9.31?
4. A diprotic acid has the following pK values: pKa1 = 5.50, pKa2 = 9.50 A. At what pH does [H2A] = [HA- ]? B. At what pH doe [HA- ] = [A2- ]? C. Which is the principal species at pH = 3.50, H2A, HA- , or A2- ? Justify your answer using the Henderson-Hasselbach equation. D. Which is the principal species at pH = 7.5, H2A, HA- , or A2- ? Justify your answer (don’t use Henderson-Hasselbach equation,...
4.32
2 4.32 U UDISCO acid, base, or both: (a) HI, (b) CH.COO, (c) H.PO. . (d) HSO Identify each of the following species as a Brønsted acid, base, or both: PO . (b) CIO. (c) NH. (0) HC0, (a) 25r + 0, (b) 2Li + H (e) 2Cs + Bry- (d) 3Mg + N; Linii - N M 22
Grade Problem 5. (10pts) A weak diprotic base B, has pKo=3 and pkp2=6 Which is / are the most abundant species (B, BH', or BH,2") at pH=11? Final Answer
2. Circle the stronger base: methylamine (pkb = 3.36) or ammonia (pKb = 4.75) Which one of the following 0.20 M aqueous solutions has the lowest pH? (Circle) a) KNO3 b) HF c) HNO, d) Al(ClO )3 e) NH Br
the pkb values for the dibasic base B are pKb1=2.10 and
pKb2=7.65 0.80
The pK values for the dibasic base B are pKo1 2.10 and pKs2 7.65. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.80 M B(aq) with 0.80 M HCI(aq). Number (a) before addition of any HCI Number (b) after addition of 25.0 mL of HCl Number (c) after addition of 50.0 mL of HCI Number (d) after addition...
The pKb values for the dibasic base B are pKb1=2.10 and pKb2=7.52. Calculate the pH at each of the points in the titration of 50.0 mL of a 0.70 M B(aq) solution with 0.70 M HCl(aq). What is the pH before addition of any HCl? pH= What is the pH after addition of 25.0 mL HCl? pH= What is the pH after addition of 50.0 mL HCl? pH= What is the pH after addition of 75.0 mL HCl? pH= What...
The pKb values for the dibasic base B are pKb1=2.10 and pKb2=7.50. Calculate the pH at each of the points in the titration of 50.0 mL of a 0.55 M B(aq) solution with 0.55 M HCl(aq). A. without any HCl B. 25mL Hcl C. 50ML hcl D. 75ML HCL E.100ML HCL
Part A.) Consider that you are titrating a diprotic weak base "B" which has pKb1=4 and pKb2=8. The product of the first ionization of B is BH+ and the product of the second ionization is BH22+. A 0.00500-mol sample of the base is dissolved in enough water to produce 100.0 mL of solution and is titrated with 0.500 M HCl. What is the exact pH when 7.2 mL of HCl is added? Enter your answer to three significant figures. Part...