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Which acid is the strongest? H3PO4 OH2PO4 HPO42- PO43- H2O Show transcribed image text
Which of the following is a conjugate acid/ base pair? A) H3PO4, PO43- B) H2PO4 , PO43- C) HPO42-, PO43- D) H3PO4, HPO42-
Which Ka for H3PO4 is represented by the expression:? [H3O+] [PO43-] ————— [HPO42-]: Ka3 Ka1 Ka2 Kb3
Which of the following is a monoprotic acid? Group of answer choices Na3PO4 H3PO4 H2PO4– HPO42– PO43–
Question 38 (1 point) Which of the following is the conjugate acid of HPO42- H3PO4 H2P04 PO43- H30*
Which equilibrium constant expression represents the first ionization of H3PO4 in water? A) [H+][H2PO4-]/[H3PO4] B) [H+][PO43-]/[HPO42-] C) [H+][PO42-]/[H2PO4-] D) [H+][H3PO43-]/[H3PO4] E) [H+][H3PO4]/[H3PO4]
Acid Acid Dissociation Constant, Ka H3PO4 7 x 10-3 H2PO4- 8 x 10-8 HPO42- 5 x 10-13 On the basis of the information above, a buffer with a pH = 9 can best be made by using A. H3PO4 + H2PO4- B. H2PO4- + PO43- C. H2PO4- + HPO42- D. HPO42- + PO43-
H3PO4 is a triprotic weak acid. What is the balanced equilibrium defined as Ka2 of H3PO4? O H2PO4 (aq) + H2O(l) =H2O*(aq) +HPO42- (aq) HPO42- (aq) + H2O(1) = OH(aq) + H2PO4 (aq) O HPO42-(aq) + H2O(1) =H20*(aq) + PO43-(aq) O H2PO4 (aq) + H2O(l) = OH" (aq) + H3PO4(aq) O H3PO.(aq) + H2O(1) =H30*(aq) + H2PO4 (aq)
Calculate the pH and the equilibrium concentrations of H2PO4-, HPO42- and PO43- in a 0.0287 M aqueous phosphoric acid solution. For H3PO4, Ka1 = 7.5×10-3, Ka2 = 6.2×10-8, and Ka3 = 3.6×10-13 pH = [H2PO4-] = [HPO42-] = [PO43-] =
Which of the following is not a conjugate acid-base pair? A H20 and H30+ B. H3PO4 and H2PO4 C. H3PO4 and HPO42- D. HPO42- and PO43 E. H2PO4 and HPO42-
15 5 points Which ion below is the conjugate base of HPO42-? o H2P04 O PO43- O HPO42- O H3PO4 H3O+ Previous