Equilibrium constants the following equilibrium constants will be useful for some of the problems. substance h2co3 substance hco2h hno2 hoci hf hcn h2so4 (cooh)2 constant ka = 1.8 0 104 ka = 4.5 0 104 k = 3.5 0 10- k = 7.2 0 104 ka = 4.0 0 10-10 k1 = very large k2 = 1.2 0 102 ko = 2.50 100 constant k1 = 4.2 x 10" k2 = 4.8 x 10-11 k1 = 5.9 x 102 k2 = 6.4 x 10-5 ke = 1.8 x 10-5 k = 4.2 x 10-10 k = 1.8 x 105 ch3cooh cehsnh2 nh3 hobi 5. refer to equilibrium constants. what is the [h3o+] of a solution that is 0.0100 m in hoci and 0.0300 m in naoci? a. 2.14 x 10-7m b. 1.45 x 107 m c. 7.41 x 10 m d. 2.29 x 108 m e. 1.17 x 10-8 m