To calculate how many times more acidic a solution of pH 1 is than a solution of pH 2, we can use the concept of pH and the hydrogen ion concentration ([H+]).

The pH scale is a logarithmic scale used to measure the acidity or basicity of a solution. It is defined as the negative logarithm (base 10) of the hydrogen ion concentration in moles per liter.

A solution with a pH of 1 has a hydrogen ion concentration of 10^(-1) M, while a solution with a pH of 2 has a hydrogen ion concentration of 10^(-2) M.

Therefore, the solution of pH 1 is 10 times more acidic than the solution of pH 2.

In general, for a difference of n pH units, the difference in hydrogen ion concentration can be calculated using the formula:

[H+] higher / [H+] lower = 10^n

So, for a difference of 1 pH unit (from 2 to 1), the higher hydrogen ion concentration is 10 times the lower hydrogen ion concentration.