Question

If each whole number change on the pH scale indicates a tenfold (10x) change in acidity,
with lower numbers being more acidic, how much more acidic is water with a
pH of 2 than water with a pH of 6? Please just put the number.

Answer 1

Answer: 10000 times

In chemistry, the pH scale is defined as a logarithmic scale used to specify the acidity or basicity of a solution.

In your example, there are four differences in the pH level between the two different water types. As each level indicates a tenfold change, then the resulting value will be 10000 from $10^{4}$ where $10^{number-of-pH-levels}$.