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The condition for minimum change in pH f...

The condition for minimum change in pH for a buffer solution is

A

Isoelectronic species are added

B

Conjugate acid or base is added

C

`pH = pK_(a)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
When `pH = pK_(a) or pOH = pK_(b)` , then buffer capacity of buffer solution is maximum .
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ERRORLESS-IONIC EQUILIBRIUM-NCERT BASED QUESTIONS (HYDROGEN ION CONCENTRATION- PH SCALE AND BUFFER SOLUTION)
  1. A buffer solution is prepared by mixing equal concentration of acid (i...

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  2. A certain buffer solution sontains equal concentration of X^(-) and HX...

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  3. The condition for minimum change in pH for a buffer solution is

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  4. The ionization constant of a certain weak acid is 10^(-4). What should...

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  5. Which is not a buffer solution

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  6. Consider the following solutions of equal concentrations {:(A= NH(4...

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  7. A buffer solution contains 0.1 mole of sodium acetate dissolved in 100...

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  8. The pH of a solution at 25^(@)C containing 0.10 M sodium acetate and 0...

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  9. The most important buffer in the blood consist of :

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  10. Henderson's equation is pH = pK(a) + log.(["salt"])/(["acid"]). If the...

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  11. Which one of the following is the buffer solution of strong acidic nat...

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  12. pH of a solution of 10 ml. 1 N sodium acetate and 50 ml 2N acetic acid...

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  13. The pH of a buffer solution containing 25 ml of 1 M CH(3)COONa " and 1...

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  14. In a mixture of weak acid and its salt, the ratio of concentration of ...

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  15. pH of a buffer solution decreases by 0.02 units when 0.12g of acetic a...

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  16. The ratio of volumes of CH(3)COOH0.1 (N) to CH(3)COONa 0.1 (N) require...

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  17. Calculate the amount of (NH(4))(2)SO(4) in grams which must be added t...

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  18. If 50ml of 0.2 M KOH is added to 40 ml of 0.5 M HCOOH, the pH of the r...

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  19. A weak acid of dissociation constant 10^(-5) is being titrated with aq...

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  20. Which of the following will produce a buffer solution when mixed in eq...

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