Question

If the hydroxide ion concentration is `3.5 × 10^"-5"color(white)(l)"mol/L"`, what are the pH and the hydrogen ion concentration?

Answer 1

`"pH = 9.54; [H"^"+"] = 2.86 × 10^"-10"color(white)(l) "mol/L"`

Explanation:

`["OH"^"-"] = 3.5 × 10^"-5"color(white)(l) "mol/L"`

`"pOH = -log"["OH"^"-"] = "-log"(3.5 × 10^"-5") = 4.46`

`"pH = 14.00 - pOH = 14.00 - 4.46 = 9.54"`

`["H"^"+"] = 10^"-pH"color(white)(l) "mol/L" = 10^"-9.54" color(white)(l)"mol/L" = 2.86 × 10^"-10"color(white)(l) "mol/L"`