Arrange the compounds within each set in order of increasing acidity (decreasing pK) in solution. Explain your

Question:

Arrange the compounds within each set in order of increasing acidity (decreasing pK") in solution. Explain your reasoning.
(a) 2-chloro- 1-propanethiol, 2-chloroethanol, 3-chloro- 1-propanethiol
(b) CH3O---CH2CH2----OH,
-O---CH2CH2 ----OH, CH3CH2CH2----- OH