The aqueous reaction between phenol (C6H5OH) and ammonia shown below, has initial concentrations of 0.200 M C6H5OH(aq) and 0.120 M NH3(aq). At equilibrium, the C6H5Oâ€"(aq) concentration is 0.050 M. Calculate the equilibrium constant Kc for the reaction. C6H5OH (aq) + NH3(aq) --> C6H5Oâ€" + NH4+(aq)