15.0 mL of a weak base, B, was titrated with 0.500 M HCl solution. 20.0 mL of the acid was added in order to reach equivalence. (Kb of the base is 1.70 x 10-8) What is the pH of the solution after 14.0 mL of acid have been added?

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.