Hey guys I need your help to solve the following question:
(a) 10^-25mol/L NaHCO3 and 10^-3 mol/L strong base NaOH are added to water (pKc1=6.3 and pkC2=10.4). What is the H2CO3 alkalinity of this solution.
(b) How could a solution with the same inorganic carbon species concentration (CT) and pH be made based on Na2CO3 reference species? Be exact and quantitative.
(c) What is the HCO3- alk of (b) solution.
(d) In what third way can (a) solution with the same CT and pH be made up? Again, be exact and quantitative.
I'm attaching my working for part (a) could you check it and help me. Thanks

Question

Hey guys I need your help to solve the following question:
(a) 10^-25mol/L NaHCO3 and 10^-3 mol/L strong base NaOH are added to water (pKc1=6.3 and pkC2=10.4). What is the H2CO3 alkalinity of this solution.
(b) How could a solution with the same inorganic carbon species concentration (CT) and pH be made based on Na2CO3 reference species? Be exact and quantitative.
(c) What is the HCO3- alk of (b) solution.
(d) In what third way can (a) solution with the same CT and pH be made up? Again, be exact and quantitative.
I'm attaching my working for part (a) could you check it and help me. Thanks

kayne · Answer

attachment