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NTA Abhyas NEET2020ChemistryIonic EquilibriumPractice

At 90 ° C , pure water has [ H 3 O + ] = 1 0 - 6 mol l i t r e - 1 . What is the value of K w at 90 ° C?

Options

  1. A1 0 - 6
  2. B1 0 - 12
  3. C1 0 - 14
  4. D1 0 - 8

Correct answer

B. 1 0 - 12

Step-by-step solution

At 90 o C, H 3 O + = OH − = 10 − 6   M So K w = [ H 3 O + ] [ O H - ] = 10 − 6 × 10 − 6 = 10 − 12

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