Preparing Acetic Acid/Acetate Buffer pH 5.6, 250 mL

[Moe*]

You want to make an acetic acid/acetate buffer, pH 5.6, with a volume of 250 mL, and a final concentration of ([AcOH] + [Aco-]). You may only use acetic acid and sodium acetate( no strong acid or base). How many mL of glacial acetic acid would be needed( d=1.05g/mL)?

 

[chemisttree]

How might the Henderson-Hasselbach equation be used to solve this?