Question

Draw a titration curve for each of the following situations. Include the volumes and pH values for all equivalence points and halfway points.
a) 45.0 mL of 0.250 M KOH is titrated with 0.400 M HCl.
b) 15.0 mL of 0.150 M CH₃NH₂ IS TITRATED WITH 0.200 M HCl.
c) 20.0 mL of 0.100 M 1,2-propanediamine, CH₃CH(NH₂)CH₂NH₂, a compound that accepts protons at two different N atoms, is titrated with 0.100 M HCl. The pK_b values for 1,2-propanediamine are 4.18 and 7.39 .

Answer 1

I will do one plot and you may do the same for the rest like the one shown below,

Titration curve for,

a) 45 ml 0f 0.25 M KOH with 0.4 M HCl

Volume of HCl added            pH

         0                                  13.40

         1                                  13.37

         5                                  13.27

         8                                  13.18

        10                                 13.12

        12                                 13.05                                  

        15                                 12.94

        20                                 11.70

        25                                 12.25

      28.125                            7.00

        30                                 2.00

        40                                 1.25

        50                                 1.03

Plot shown below