Which of the following statements is true concerning a 0.50 M hydrozine N2H4 solution of 30.0 mL titrated with 0.50 M HCl solution. Kb( N2H4 ) = 1.7 x 10-6. Note that the conjugate acid of N2H4 is N2H5+. Choose one option only. Options:

Which of the following statements is true concerning a 0.50 M hydrozine N₂H₄ solution of 30.0 mL titrated with 0.50 M HCl solution. K_b( N₂H₄ ) = 1.7 x 10^-6. Note that the conjugate acid of N₂H₄ is N₂H₅⁺. Choose one option only.

Options:

a. Before titration, [OH^- ] > [ N₂H₄ ] in the 0.50 M N₂H₄ solution.

b. After adding 5.00 mL HCl into the 0.50 M N₂H₄ solution, [N₂H₅⁺] > [ N₂H₄ ] in the solution.

c. After adding 15.0 mL HCl into the 0.50 M N₂H₄ solution, [ N₂H₅⁺ ] = [ N₂H₄ ] in the solution.

d. After adding 25.0 mL HCl into the 0.50 M N₂H₄ solution, [N₂H₅⁺] < [ N₂H₄ ] in the solution.

e. After adding 30.0 mL HCl into the 0.50 M N₂H₄ solution, [ H₃O⁺ ] = [OH^- ] in the solution.