Question: An amount of NaHCO; was added to water such that the total carbonate concentration was 104 M. If it is assumed that no other

An amount of NaHCO; was added to water such that the total

An amount of NaHCO; was added to water such that the total carbonate concentration was 104 M. If it is assumed that no other constituents are present, a pC-pH diagram for this water-carbonate system is shown below. (a) What is the statement of mass balance for total dissolved carbonate in the system? (b) What is the charge balance for dissolved species in the system? (c) What is the proton condition for this system if NaHCO3 was added to water? (d) Using the diagram and the proton condition for this system, what is the equilibrium pH? (e) What is the equilibrium solution condition indicated by the left vertical dashed line at pH = 5.1-5.2? If you were doing an acid titration starting at pH 8, explain what this point represents. pH 8 10 12 14 [OH] 2 [HCO3] [Co321 4 [H2CO3"| 6 8 + 10 12 14 pC 2.

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