Question

When you go to prepare the buffer described in the previous problem, you discover that your laboratory is out of sodium acetate. But you do have sodium hydroxide. How much (in mol and g) acetic acid and sodium hydroxide do you need to make the buffer?

(Previous problem: You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acid plus acetate concentration of 250 mM and a pH of 5.0. What concentrations of acetic acid and sodium acetate should you use? Assuming you wish to make 2 L of this buffer, how many moles of acetic acid and sodium acetate will you need? Answers: 90 mM acetic acid, 160 mM sodium acetate, 0.18 mol acetic acid, 0.32 mol sodium acetate).

Answer 1