Here's how to calculate the hydrogen ion concentration ([H+]) from a pH of 6.2:

Understanding the Relationship

* pH is a measure of the acidity or alkalinity of a solution. It's defined as the negative logarithm (base 10) of the hydrogen ion concentration:

pH = -log[H+]

* [H+] is the hydrogen ion concentration, expressed in moles per liter (mol/L).

Calculation

1. Rearrange the pH equation to solve for [H+]:

[H+] = 10^(-pH)

2. Substitute the given pH value:

[H+] = 10^(-6.2)

3. Calculate using a calculator:

[H+] ≈ 6.31 x 10^-7 mol/L

Therefore, the hydrogen ion concentration of a solution with a pH of 6.2 is approximately 6.31 x 10^-7 mol/L.