Hello!, I have encountered a problem relating to buffer solutions. The question states that I am to make a Sodium Acetate buffer solution of 0.25mol l-1, at pH 6.8. The reagents used to make the buffer solution however, is Acetic acid and Sodium Hydroxide. The pKa of Acetic acid is given as 4.75. I need to calculate the amounts (in moles) of acid/salt present in the buffer at the desired pH. So far, all I got is the balanced reaction: CH3COOH + NaOH <--> H2O + CH3COONa. Where do I go from there? Edit: I am aware of the Henderson-Hasselbalch equation but I do not know how the values fit in save for the pH and pKa. The final concentration is know (sodium acetate) but there are no values for the acid or the base, also, the Henderson-Hasselbalch equation is probably more useful for finding the pH of known solution concs. So, I do not know how to proceed!