How do you make a buffer?

A buffer is a mix of an excess of weak acid and its salt. Buffers can be made in two ways- by mixing the weak acid with its salt or by partially neutralising the weak acid with base. 1- Making buffers by mixing acid and saltCH₃COOH <--> CH₃COO^- + H⁺ 2- Making buffers by partially neutralising a weak acid with a baseCH₃COOH + NaOH <--> CH₃COONa + H₂O0.5 mol 0.25 mol 0 mol 0 mol0.25 mol 0 mol 0.25 mol 0.25 mol (after neutralisation)(would use whiteboard to explain and visualise equilibrium)