Rank the following compounds in order of decreasing acidity, putting the most acidic first. $$\begin{array} { c c c c }
\mathrm { CH } _ { 3 } \mathrm { OCH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { CHO } & \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } & \mathrm { CH } _ { 3 } \mathrm { COOH } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Question

Rank the following compounds in order of decreasing acidity, putting the most acidic first. $$\begin{array} { c c c c } 
\mathrm { CH } _ { 3 } \mathrm { OCH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { CHO } & \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } & \mathrm { CH } _ { 3 } \mathrm { COOH } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Quizplus · Accepted Answer

Acetic acid (IV) is the most acidic due to its carboxylic acid group. Ethanol (III) is next due to its hydroxyl group. Acetaldehyde (II) is less acidic than ethanol, and dimethyl ether (I) is the least acidic.

Rank the Following Compounds in Order of Decreasing Acidity, Putting