Question

A solution has a hydrogen ion (or hydronium ion) concentration of 3.16 x 10^-9 M. What is the PH solution?

Answer 1

Rememebr my dear that to find pH when given [H+], use
-log[H+].
-log[3.16*10^9] = 8.5
I hope this can help you indeed

Answer 2

Answer: 8.5

Explanation:

pH  is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

Given : Concentration of hydrogen ion= $[H^+]=3.16\times 10^{-9}$

Putting in the values in the given formula:

$pH=-log{3.16\times 10^{-9}}$

$pH=8.5$