A buffer is made by mixing 250 mL of 0.10 M acetic acid with 250 mL of 0.10 M sodium…
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A buffer is made by mixing 250 mL of 0.10 M acetic acid with 250 mL of 0.10 M sodium acetate. What is the greatest volume of 0.50 M HCl that can be added before the pH drops below 4.50? (pKa for acetic acid = 4.74.)
(a) 10mL
(b) 25mL
(c) 13mL
(d) 6.7mL