Execution of Strategy: (a) HF and NaF are mixed. HF and F- will both be present. This will make a buffer.
Is NaF and NaOH a buffer?
Remember, Na+ is a spectator ion. (A) HCl and KCl – strong acid and its conjugate base. This is not a buffer (B) NaOH and NaCl -- strong base and its conjugate acid.
Which would form a buffer?
Buffers do so by being composed of certain pairs of solutes: either a weak acid plus a salt derived from that weak acid or a weak base plus a salt of that weak base. For example, a buffer can be composed of dissolved acetic acid (HC 2H 3O 2, a weak acid) and sodium acetate (NaC 2H 3O 2, a salt derived from that acid).
