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Titrations: Weak Acid-Strong Base

18. Aqueous Equilibrium / Titrations: Weak Acid-Strong Base / Problem 1

A 35.0 mL of 0.225 M HCNO was titrated with 0.215 M KOH. Determine the volume of 0.215 M KOH necessary to reach the equivalence point. Calculate the pH after the addition of 85.0 mL of the base. The pK_a for cyanic acid is 3.46.

A

60.0 mL; 2.25×10⁻¹ M

B

60.0 mL; 2.15×10⁻¹ M

C

42.5 mL; 5.05×10⁻² M

D

36.6 mL; 8.67×10⁻² M

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