What is the hydronium ion concentration of an acid rain sample that has a pH of 3.45?

3.55 x 10^-4 M

pH = -log(H^+)

Substitute 3.45 for pH and solve.

Thank you

To determine the hydronium ion concentration of an acid rain sample with a pH of 3.45, we can use the equation:

pH = -log[H3O+]

First, rearrange the equation to solve for [H3O+]:

[H3O+] = 10^(-pH)

Substitute the given pH value (3.45) into the equation:

[H3O+] = 10^(-3.45)

Using a scientific calculator, evaluate 10^(-3.45):

[H3O+] ≈ 3.48 x 10^(-4) M

Therefore, the hydronium ion concentration of the acid rain sample is approximately 3.48 x 10^(-4) M.