26. Calculate the pH of a buffer solution made from 0.40 M HC2H2O2 and 1.0 M C2H302 that has an acid
dissociation constant for HC2H2O2 of 3.6 x 10-5.
a. 5.1 b. 6.1
c.7.1 d. 10.1
27. Calculate the pH of a buffer solution consisting of 0.051 M NH3 and 0.037 M NH4+. The Kb for NH3
= 1.8 x 10-5. NH3 + H2O = NHa* + OH-
a. 9.39
b. 9.0
c. 9.1 d. 9.5
28. Refers to the reaction in which a water molecule donates one of its protons (H atom) to a
neighboring water molecule, either in pure water or in aqueous solution.
a. Auto lonization b. Protonation c. electronegativity d. dissociation
29. The OH ion concentration of a blood sample is 5.0 x 10' M. What is the pH of the blood?
a. 7.7 b. 7.4 c.7.0 d. 7.5
30. The pH of an unknown solution is 2.84. What is the (OH- ) and pOH of the solution?
a. 7x10-12 M;11.16 b.7 x10-10 M;10.0 c. 7x10-12 M;10.0 d. 7x10-10 M;11.16​