Explanation:
- Weak acid: An acid which does not completely dissociate in solution is called weak acid.
- Example of weak acid: Almost every organic acid is a weak acid. Phenol is also an example of a weak acid.
- The pH value of weak acid lies between 5 to 7.
- is an example of a weak acid as the pH value of this is between 5.5 to 7.
Hence, is a weak acid.