Here's why:

* The pH scale ranges from 0 to 14.

* A pH of 7 is neutral.

* Values below 7 are acidic.

* Values above 7 are basic (alkaline).

Yellow typically corresponds to a pH range between 6 and 6.5. This means that while it's not strongly acidic, it's still slightly acidic.

Remember: The exact pH range represented by yellow can vary depending on the specific pH indicator used.