The hydrogen-ion concentration of a solution of pOH 10.5 is 3.16 × 10^-4 mol/L (remember that pH + pOH = 14 for aqueous systems).

Name: The hydrogen-ion concentration of a solution of pOH 10.5 is 3.16 × 10 -4 mol/L (remember that pH + pOH = 14 for aqueous systems).
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Quizplus · Accepted Answer

The given pOH value is 10.5, which means the pH of the solution is 14 - 10.5 = 3.5. The hydrogen-ion concentration is then calculated as 10^-pH = 10^-3.5 = 3.16 × 10^-4 mol/L, which matches the given value.

The Hydrogen-Ion Concentration of a Solution of POH 10