Which of the following mixtures would result in a buffered solution? A)Mixing 100.0 mL of 0.100 M HCl with 100.0 mL of 0.100 M NaOH. B)Mixing 100.0 mL of 0.100 M NH₃ (K_b = 1.8 $\times$10^-⁵)with 100.0 mL of 0.100 M NaOH. C)Mixing 100.0 mL of 0.100 M HCl with 100.0 mL of 0.100 M NH₃ (K_b = 1.8 $\times$ 10^-⁵). D)Mixing 50.0 mL of 0.100 M HCl with 100.0 mL of 0.100 M NH₃ (K_b = 1.8 $\times$10^-⁵). E)At least two of the above mixtures would result in a buffered solution.

Question

Quizplus · Accepted Answer

A buffered solution is formed when a weak acid and its conjugate base or a weak base and its conjugate acid are present. Mixing HCl and NH3 in option D results in a buffer because NH3 is a weak base and reacts partially with HCl to form NH4+, its conjugate acid, creating a buffer system.

Which of the Following Mixtures Would Result in a Buffered ×\times×

Which of the Following Mixtures Would Result in a Buffered $\times$