Question 1
Arrange the acids HOCl, HClO
3, and HClO
2 in order of increasing acid strength.
◦ HOCl < HClO
3< HClO
2◦ HOCl < HClO
2< HClO
3◦ HClO
2< HOCl < HClO
3◦ HClO
3 < HOCl < HClO
2◦ HClO
3 < HClO
2< HOCl
Question 2
Aspartic acid (C
4H
7NO
4), one of the 20 essential amino acids, has two ionizable hydrogens. At 25°C, K
a1 = 1.38 × 10
–4 and K
a2 = 1.51 × 10
–10. What is the concentration of doubly ionized aspartate ions in a 0.125 M aqueous solution of aspartic acid?
◦ 3.33 × 10
–2 M
◦ 4.16 × 10
–3 M
◦ 4.15 × 10
–3 M
◦ 1.51 × 10
–10 M
◦ 2.08 × 10
–14 M