Final answer:
The concentration of hydronium ions ([H₃O+]) in a solution with the lowest pH mentioned in the example is 1.5 micromolar or 1.5 x 10^-6 M. This calculation is part of high school chemistry.
Step-by-step explanation:
The question involves finding the concentration of hydronium ions ([H₃O+]) in a solution with the lowest given pH, which is a chemistry-related calculation typically encountered in high school. When discussing pH and [H₃O+], it's important to understand that pH is the negative logarithm (base 10) of the hydronium ion concentration. A lower pH value indicates a higher concentration of hydronium ions, and vice versa.
According to the information provided, the hydronium ion concentration is 1.5 µM (micromolar), which can be written as 1.5 x 10-6 M. Using the formula pH = -log[H₃O+], the pH of this solution would be acidic, as the pH scale ranges from 0 (most acidic) to 14 (most basic), with 7 being neutral.