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MHT CET20242 May 2024Morning ShiftChemistryIonic EquilibriumActual

What is the ratio of concentration of salt to concentration of weak acid in buffer solution to maintain its pH value 7.2 ( pK _ a =6.2 ) .

Options

  1. A1.5
  2. B10.0
  3. C5.0
  4. D8.5

Correct answer

B. 10.0

Step-by-step solution

aligned & pH = pKa + [ Salt ] [ Acid ] & 7.2=6.2+ [ Salt ] [ Acid ] & 1= [ Salt ] [ Acid ] = ₁₀ 10 & [ Salt ] [ Acid ] =10 aligned

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