Question 1
Calculate the concentration of oxalate ion (C
2O
42–) in a 0.175 M solution of oxalic acid (C
2H
2O
4). [For oxalic acid, K
a1 = 6.5 × 10
–2, K
a2 = 6.1 × 10
–5.]
◦ 0.11 M
◦ 6.1 × 10
–5 M
◦ 4.0 × 10
–6 M
◦ 0.0791 M
◦ 0.175 M
Question 2
Calculate the H
+ ion concentration in a 8.8 × 10
–4 M Ca(OH)
2 solution.
◦ 8.8 × 10
–4 M
◦ 1.8 × 10
–3 M
◦ 2.2 × 10
–11 M
◦ 1.1 × 10
–11 M
◦ 5.7 × 10
–12 M