Question 1
Vinegar is a 5.0% solution by weight of acetic acid (CH
3CO
2H) in water. Given that
Ka = 1.8 × 10
-5 for acetic acid and assuming the density of vinegar to be 1.00 g/cm
3, what is the pH of this vinegar solution?
◦ 2.87
◦ 2.00
◦ 4.74
◦ 2.41
Question 2
Vinegar is a 5.0% solution by weight of acetic acid (CH
3CO
2H) in water. Given that the pH for acetic acid is 2.41, the
Ka = 1.8 × 10
-5 and assuming the density of vinegar to be 1.00 g/cm
3, what is the percent dissociation of acetic acid in vinegar?
◦ 0.47%
◦ 1.5%
◦ 5.0%
◦ 4.0%