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pH of a solution made by dissolving a given mass of NaOH or KOH in 500 mL

The same question, asked 2 times: 20 Apr 2025 S2*, 11 Apr 2026 S2. Every wording below, oldest first.

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  1. Question 1

    20 Apr 2025 S2

    67
    4 gram of NaOH is added in water to form 500 mL solution at 298 K . What is pH of solution? (Molar mass of NaOH=40 g mol−1NaOH = 40\text{ }g{\text{ }mol}^{- 1})

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  2. Question 2

    11 Apr 2026 S2

    8
    2.82.8 g of KOH is dissolved in a 500500 mL solution at 298298 K. What is the pHp^H of solution ? (molar mass of KOH = 5656 g/mol)

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