You're asking about the pH range of acidic solutions.

Here's how it works:

* The pH scale: Ranges from 0 to 14.

* Acids: Have a pH below 7.

* Neutral: A pH of 7 (like pure water).

* Alkaline (or basic): Have a pH above 7.

So, you'll find acidic solutions in the pH range of 0 to 6.9.

Important Note: The lower the pH, the stronger the acid.