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What is the pH of a 10⁻⁴ M OH ⁻ solution at 330 ~K , if K _ w at 330 ~K is 10^ -13.6 ?

Options

  1. A4
  2. B9.0
  3. C10
  4. D9.6

Correct answer

D. 9.6

Step-by-step solution

Given at 330 ~K aligned K _w & =10^ -13.6 i.e. pK _w & = pH + pOH pOH ^2 & =- [ OH ⁻ ] 13.6 & = pH + pOH pOH & =- 10⁻⁴ 13.6 & = pH +4 pH & =13.6-4 & =9.6 aligned

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