Question

What is the concentration of hydrogen ions in a solution of pH = 4.0?

Answer 1

`"concentration of H"^+ = "0.0001M"`

Explanation:

`"pH" = -log("concentration of H"^+)`

`or, 10^-"pH" = "concentration of H"^+`

From the given info

`"pH"` = 4

`therefore 10^-4 = 0.0001`

`"concentration of H"^+ = "0.0001M"`