Prepare 100ml of an acetic acid and sodium acetate buffer w/ a pH of 4.50.
HC2H3O2 (aq) = 0.53M
NaC2H3O2 (s) = 136.08g/mol
Ka HC2H3O2 = 1.8 * 10^-5

Question

Prepare 100ml of an acetic acid and sodium acetate buffer w/ a pH of 4.50. 
HC2H3O2 (aq) = 0.53M
NaC2H3O2 (s) = 136.08g/mol
Ka HC2H3O2 = 1.8 * 10^-5

aveline · Answer

I'm starting out with this equation:
HC2H3O2 + H20 <-> C2H3O2 + H30
Is this correct?

vocaloid · Answer

the equation is good, just don't forget the + charge on H3O and the - charge on c2H3O2

vocaloid · Answer

know where to go from there?

aveline · Answer

Not really.

aaronq · Answer

Next you wanna use the Henderson-Hasselbach equation to find the concentrations of acid and conjugate base needed. Translate those concentrations into moles.

aveline · Answer

@JFraser @sweetburger 
Can either of you help?

jfraser · Answer

@aaronq has given you the next step,  you need to use the H-H equation to find the number of moles of each species, the acid and its conjugate, that will give you a pH of 4.5