[ms_harleyquinn]

Calculate the theoretical titration curve for the titration of 50.00 mL of 0.1000 M Na2CO3 with a 0.2000 M solution of HCl. Propose the indicators.

Determine the pH determining species, Formula for calculation of H3O+,  and pH at each given volume of titrant added.

Volume of the titrant added (mL)
0.00
12.50
20.00
24.00
25.00
26.00
37.50
45.00
49.00
50.00
51.00
60.00

I know this is a weak base being titrated with a strong acid. Is this a diprotic titration? I'm not too sure how to start this question.

[AWK]

http://www.chemicalforums.com/index.php?topic=7578.0

[Pradeep]

Since K_a1/K_a2 > 10⁴ you can assume they two pronation steps are occurring in two steps , one after one.

I hope now you will be able to do this.