10. The solubility of ferrous iron is given by the following for pH less than 11: Fe(OH),(s) Fe + 2OH log k, = 14.7 Fe(OH),(s) FeOH' + OH log K = 9.4 You also need to consider the following reaction between ferrous ions and fluoride: FeF log k, = +1.4 What is the total solubility of Fe(li) at pH-8 in the presence of solid ferrous hydroxide, Fe(OH)4s). with 10 mol/LF? (4) FeF 11. What is the pH of an aqueous solution of 10-6 M hydrogen sulfide (H,S) in de-ionized water, given the pk, = 7.1 and pK- 14