Question

what is the hydrogen ion concentration of a solution whose pH is 5.6​

Answer 1

The formula for pH is:

[math]pH = -\log_{10}[H+][/math]

So to calculate the hydrogen ion concentration the calculation is:

[math][H+] = 10^{-pH}[/math]

Example for pH 3.5:

[math][H+] = 10^{-3.5} = 3.162 \times 10^{-4} mol/L[/math]