Question

Which one is weakest acid ?
① Formic acid
② Acetic acid
③ Stearic acid
(4) palmitic acid

Answer 1

Answer:

Formic acid

Explanation:

i don't know

Answer 2

Among the given acids, the weakest acid is stearic acid.

Explanation:

• The acidity of the carboxylic acids decreases with the increase in the number of carbon atoms or the length of the carbon chain.
• The formulas of the following acids are:

         Formic acid - $\[HCOOH\]$

         Acetic acid - $\[C{H_3}COOH\]$

         Stearic acid - $\[{C_{18}}{H_{36}}{O_2}\]$

         Palmitic acid - $\[{C_{16}}{H_{32}}{O_2}\]$

• As stearic acid has the highest number of carbon atoms, therefore, it will be the weakest acid.