Answer:
1.62x10⁻¹² M
Explanation:
HClO₃ is a strong acid, meaning that a 6.2x10⁻³ M solution has a molar concentration of H⁺ of 6.2x10⁻³.
With the above information in mind, we can calculate the pH of the solution:
Now we can calculate the pOH of the solution, using the pH:
Finally we calculate [OH⁻], using the definition of pOH: