5. What is the pH of a 0.1 M H3PO4 and 0.1 M KH2PO4 solution? Ka1 = 7.5×10-3, Ka2 = 6.2×10-8, and Ka3 = 4.8×10-13 (A) 4.67 (B) 3.25 (C) 2.12 (D) 1.56

9. Which of the following statements is true?(A) Water evaporated spontaneously at 1 atm and 101 ˚C because liquid water has the larger entropy thanits vapor at this condition.(B) Water evaporated spontaneously at 1 atm and 101 ˚C because liquid water has the larger free energythan its vapor at this condition.(C) Water evaporated spontaneously at 1 atm and 101 ˚C because liquid water has the larger enthalpy thanits vapor at this condition.(D) none of these.

5. What is the pH of a 0.1 M H₃PO₄ and 0.1 M KH₂PO₄ solution? K_a1 = 7.5×10^-3, K_a2 = 6.2×10^-8, and K_a3 = 4.8×10^-13
(A) 4.67
(B) 3.25
(C) 2.12
(D) 1.56

相關試題

相關試卷

5. What is the pH of a 0.1 M H3PO4 and 0.1 M KH2PO4 solution? Ka1 = 7.5×10-3, Ka2 = 6.2×10-8, and Ka3 = 4.8×10-13(A) 4.67(B) 3.25(C) 2.12(D) 1.56

相關試題

相關試卷

5. What is the pH of a 0.1 M H₃PO₄ and 0.1 M KH₂PO₄ solution? K_a1 = 7.5×10^-3, K_a2 = 6.2×10^-8, and K_a3 = 4.8×10^-13
(A) 4.67
(B) 3.25
(C) 2.12
(D) 1.56