Calculate the [h3o') in a solution that has a ph of 9.11 a) 7.8 x 1010 b) 1.3 x 10-5 c) 9.1 x 10- d) 0.96 e) 0.69 11. which of the following is a strong acid? a) hcio2 b) hf c) hbo d) h2so3 e) h2so4 12. which of the following aqueous salt solutions would you expect to be neutral, le ph = 7 a) nacn(aq) b) nh br(aq) c) nacn(aq) d) kbr(aq) e) ca(no2)2(aq)