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    • Question

      At pH 9.0 of alkali soil, the concentration of

      OH– is
      A 10ˉ⁵ mole/litre Correct Answer Incorrect Answer
      B 10ˉ⁷ mole/litre Correct Answer Incorrect Answer
      C 10ˉ⁶ mole/litre Correct Answer Incorrect Answer
      D 10ˉ⁸ mole/litre Correct Answer Incorrect Answer

      Solution

      In a solution at pH 9.0, the concentration of OH⁻ ions is 10–5 mole/litre, which can be calculated using the relationship pOH=14−pHpOH=14−pH and [OH−]=10−pOH[OH−]=10−pOH.

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