Why choloracetic acid is a stronger acid than acetic acid

Question

Discussion:

H^₃O⁺ Preferred over H⁺

1. Explain why some authors never write H⁺, but always write H_³O⁺.

2. Any ⁺ ion in solution is attracted to the polar water molecules, but we often write Na+ ignoring the water. What is different about H⁺ that many chemists never write it alone?

3. Explain why choloracetic acid is a stronger acid than acetic acid.