Here's a breakdown:

* pH Scale: This scale measures the acidity or alkalinity of a substance.

* Acidic: Substances with a pH lower than 7 are acidic.

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

* Alkaline (Basic): Substances with a pH higher than 7 are alkaline.

Why is soda acidic?

Soda's acidity mainly comes from the phosphoric acid and citric acid added to give it its tart flavor. These acids can contribute to tooth enamel erosion, particularly when consumed frequently.

Comparison with other drinks:

* Coffee: pH of 4.5 to 5.5

* Tea: pH of 5.5 to 6.5

* Milk: pH of 6.5 to 6.7

* Water: pH of 7.0

As you can see, soda's pH is significantly lower than these other beverages, making it much more acidic.