Question 1
An aqueous solution has [HC
7H
5O
2] = 0.100 M and [Ca(C
7H
5O
2)
2] = 0.200 M.
Ka = 6.3 × 10
-5 for HC
7H
5O
2. The solution volume is 5.00 L. What is the pH of this solution after 5.00 mL 10.0 M HCl(aq) is added?
◦ 4.80
◦ 4.86
◦ 4.65
◦ 4.70
◦ 4.75
Question 2
An aqueous solution has [HC
7H
5O
2] = 0.100 M and [Ca(C
7H
5O
2)
2] = 0.200 M.
Ka = 6.3 × 10
-5 for HC
7H
5O
2. The solution volume is 5.00 L. What is the pH of the solution after 10.00 mL of 5.00 M NaOH is added?
◦ 4.80
◦ 4.86
◦ 4.65
◦ 4.70
◦ 4.75