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To obtain a buffer wich should be suitab...

To obtain a buffer wich should be suitable for maintaining a pH of about 4-5, we need to have in solution, a mixture of

A

A strong base + its salt with a weak acid

B

A weak base + its salt with a strong acid

C

A strong acid + its salt with a weak base

D

A weak acid + its salt with a strong base

Text Solution

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The correct Answer is:
D
A weak acid and its salt with a strong base maintain pH 4-5.
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Asseration : A solution containing a mixture of acetic acid and sodium acetate maintains a constant value of ph on addition of small amounts of acid or alkali. Reason : A solution containing a mixture of acetic acid and sodium acetate acts as a buffer solution around ph 4.75.

The solution which consumes [H^(+)] or [OH^(-)] or both simultaneously from externally added base in order to give negligible change in pH , is known as buffer solution. In general, the solution resists the change in pH. Buffer solution does not mean that there does not occur a pH change in pH. Buffer solution des not mean that there does not occur a pH change at all. It implies the pH change occurs but in neglibible amount. There are two types of buffer (i) Acidic buffer: it is a mixture of weak acid and its salt acid strong base. (ii) Basic buffer : It is a mixture of weak base and its salt with strong acid. pH of 0.01 M (NH_(4))_(2)SO_(4) and 0.02 M NH_(4)OH buffer ( pK_(a) of NH_(4^(+)) = 9.26) is

A student is asked to prepare a buffer solution with a pH of 4.00. This can be accomplished by using a solution containing which of the following ?

The buffer solution of 100 ml having a pH value 4 when added to 1 ml dilute HCl , then the pH of buffer solution

The pH of solution is 4.0 what should be the change in the hydrogen ion concentration of the solution if its pH is to be increased to 5.0

ERRORLESS-IONIC EQUILIBRIUM-NCERT BASED QUESTIONS (HYDROGEN ION CONCENTRATION- PH SCALE AND BUFFER SOLUTION)
  1. Which is incorrect for buffer solution

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  2. Components of buffer solution are 0.1 M HCN and 0.2 M NaCN. What is th...

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  3. To obtain a buffer wich should be suitable for maintaining a pH of abo...

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  4. Which of the following mixtures forms an acid buffer ?

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  5. A buffer solution has equal volume of 0.20 M NH(4)OH and 0.02 MNH(4)Cl...

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  6. How much sodium acetate should be added to a 0.1 M solution of CH(3)CO...

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  7. Which of the following is a buffer

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  8. A buffer solution is prepared by mixing equal concentration of acid (i...

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

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

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

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  12. Which is not a buffer solution

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

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

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

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

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

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

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

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

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