The solubility product of mercury (II) hydroxide Hg(OH)2(S) and constants of the hydroxo complexes of Hg2+ are shown in the table below.

(b) Also determine how the formation of carbonate complexes of Hg2+ affect its total soluble concentration in conditions described above. The logarithms of the formation constant of [HgCO30] and [Hg(CO3)22-] complexes logbHgCO3 and logbHg(CO3)2 are 12.1 and 15.9, respectively. Assume that the system is closed and the total concentration of carbonate (TOTCO3) is 10-2 M. Determine the total Hg(II) concentration at pH 9.0.

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