What is the pH of a solution that is prepared by dissolving 6.69 grams of lactic acid (formula weight = 90.08 grams/mol) and 8.77 grams of sodium lactate (formula weight = 112.06 grams/mole) in water and diluting to 700.00 mL? The Ka for lactic acid is 0.000137.

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.