Question

What is the hydronium (H3O+) concentration of a solution with a pH of 3.60? A. 2.5 × 10-4 M B. 3.0 × 10-4 M C. 4.0 × 10-11 M D. 4.5 × 10-11 M

Answer 1

The H3O+  concentration  of the solution with  a PH  of 3.60  is  2.5  x10^-4 M (answer  A)

   explanation

PH is calculated  using PH = - log  [ H3O+]  formula

Therefore  - log [H3O+]  = 3.60

To calculate  the concentration of h3O+  ,find the  antilog  of 3.60

Since  -log is at base of 10, the antilog  of 3.60  = 10^-3.60  = 2.5 x10^-4M

Answer 2

Answer:

$[H_3O^+]=2.5x10^{-4}M$

Explanation:

Hello,

In this case, since the pH is mathematically defined as:

$pH=-log([H_3O^+]}$

By solving for the hydronium's concentration with the given pH, its value turns out:

$[H_3O^+]=10^{-pH}=10^{-3.60}=2.5x10^{-4}M$

Best regards.