Question

1)Calculate the pH during the titration of 20.0 mL of 0.25 M HBr with 0.25 M KOH after 20.7 mL of the base have been added.

2)Calculate the pH during the titration of 40.00 mL of 0.1000 M HNO₂(aq) with 0.1000 M KOH(aq) after 24 mL of the base have been added. K_a of nitrous acid = 7.1 x 10^-4.

3)Calculate the pH during the titration of 20.00 mL of 0.1000 M trimethylamine, (CH₃)₃N(aq), with 0.2000 M HCl(aq) after 4.5 mL of the acid have been added. K_b of trimethylamine = 6.5 x 10^-5.

4)4)Calculate the pH during the titration of 20.00 mL of 0.1000 M HCOOH(aq) with 0.1000 M NaOH(aq) after 19.1 mL of the base have been added. K_a of formic acid = 1.8 x 10^-4.

5)Determine the volume in mL of 0.32 M KOH(aq) needed to reach the equivalence (stoichiometric) point in the titration of 28 mL of 0.69 M HBrO(aq). The K_a of HBrO is 2.3 x 10^-9.

6)Determine the pH at the equivalence (stoichiometric) point in the titration of 29 mL of 0.26 M propanoic acid(aq) with 0.28 M NaOH(aq). The K_a of propanoic acid is 1.3 x 10^-5.

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Answer 1