Which of the following mixtures will be a buffer when dissolved in a liter of water? A)0.4 mol NH₃ and 0.4 mol HCl B)0.3 mol NaCl and 0.3 mol HCl C)0.1 mol Ca(OH)₂ and 0.3 mol HI D)0.2 mol H₃PO₄ and 0.1 mol NaOH E)0.2 mol HBr and 0.1 mol NaOH

Question

Quizplus · Accepted Answer

A buffer solution must contain a weak acid and its conjugate base or a weak base and its conjugate acid. In option D, H₃- is a weak acid and can act as a buffer with its conjugate base ₃PO₄-. NaOH can act as a base and can be used to adjust the pH of the buffer solution. None of the other options contain an appropriate weak acid/conjugate base or weak base/conjugate acid pair.

Which of the Following Mixtures Will Be a Buffer When