Question 2 Dissolved Si in Water (20 points) (use video on how to make a speciation diagram" as needed) Silicic acid H.SiO is a weak-acid that can deprotonate into the species H3Si04 as shown below. Thus the concentration of H2SiO4 is very dependent on pH. (i) H_SiO4(aq) + H2SiO4 (aq) + H+ (aq) ++ K = 10-9.7 = Let's assume that a lake contains a total amount of dissolved Si (Si) that is 10-M. a (a) At which pH does [H4Si04] = [HzSiO4]. Show how you know. =