Boric acid is a weak acid with an equilibruim constant(K)of 10-9.3. What is the pH balance of a 0.1 molar solution of boric acid?

Answer 1

..........H3BO3 ==> H^+ + H2BO3
I..........0.1M......0.......0
C...........-x........x.......x
E.........0.1-x........x......x

Ka = (H^+)H2BO3^-)/(H3BO3)
Subsitute from the ICE chart and solve for x = (H^+) and convert to pH.