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JEE Main202325 Jan 2023Evening ShiftChemistryIonic EquilibriumActual

When the hydrogen ion concentration H + changes by a factor of 1000 , the value of pH of the solution

Options

  1. Aincreases by 1000 units
  2. Bdecreases by 3 units
  3. Cdecreases by 2 units
  4. Dincreases by 2 units

Correct answer

B. decreases by 3 units

Step-by-step solution

Let the initial concentration of H + be 1 ∴   H + i   =   1   ⇒   pH   =   0 It changes by 1000 units ∴   H + f   =   10 3   ⇒   pH   =   - 3 So, pH decreases by 3 units.

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