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The pH of an acidic buffer mixture is:...

The `pH` of an acidic buffer mixture is:

A

`gt7`

B

`lt7`

C

`=7`

D

depends upon `K_(a)` of acid

Text Solution

Verified by Experts

The correct Answer is:
D
`pH=pK_(a)+log([Sal t])/([Acid])`
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The pH of basic buffer mixtures is given by : pH=pK_(a)+log((["Base"])/(["Salt"])) , whereas pH of acidic buffer mixtures is given by: pH= pK_(a)+log((["Salt"])/(["Acid"])) . Addition of little acid or base although shows no appreciable change for all practical purpose, but since the ratio (["Base"])/(["Salt"]) or (["Salt"])/(["Acid"]) change, a slight decrease or increase in pH results in. The volume of 0.2M NaOH needed to prepare a buffer of pH 4.74 with 50 mL of 0.2M acetic acid is: (pK_(a) of CH_(3)COO^(-)= 9.26)

The pH of basic buffer mixtures is given by : pH=pK_(a)+log((["Base"])/(["Salt"])) , whereas pH of acidic buffer mixtures is given by: pH= pK_(a)+log((["Salt"])/(["Acid"])) . Addition of little acid or base although shows no appreciable change for all practical purpose, but since the ratio (["Base"])/(["Salt"]) or (["Salt"])/(["Acid"]) change, a slight decrease or increase in pH results in. The amount of (NH_(4))_(2)SO_(4) to be added to 500 mL of 0.01M NH_(4)OH solution (pK_(a) for NH_(4)^(+) is 9.26) prepare a buffer of pH 8.26 is:

The pH of basic buffer mixtures is given by : pH=pK_(a)+log((["Base"])/(["Salt"])) , whereas pH of acidic buffer mixtures is given by: pH= pK_(a)+log((["Salt"])/(["Acid"])) . Addition of little acid or base although shows no appreciable change for all practical purpose, but since the ratio (["Base"])/(["Salt"]) or (["Salt"])/(["Acid"]) change, a slight decrease or increase in pH results in. A solution containing 0.2 mole of dichloroacetic acid (K_(a)=5xx10^(-2)) and 0.1 mole sodium dichloroacetate in one litre solution has [H^(+)] :

The pH of basic buffer mixtures is given by : pH=pK_(a)+log((["Base"])/(["Salt"])) , whereas pH of acidic buffer mixtures is given by: pH= pK_(a)+log((["Salt"])/(["Acid"])) . Addition of little acid or base although shows no appreciable change for all practical purpose, but since the ratio (["Base"])/(["Salt"]) or (["Salt"])/(["Acid"]) change, a slight decrease or increase in pH results in. A weak acid HA after treatment with 12 mL of 0.1M strong base BOH has a pH=5 . At end point, the volume of same base required is 26.6mL K_(a) of acid is:

The Ph of basic buffer mixtures is given by : Ph=Pk_(a)+ log (["Base"])/(["Salt"]) whereas Ph of acidic buffer mixtures is given by : Ph = pK_(a)+"log"(["Salt"])/(["Acid"]) . Addition of little acid or base although shows no appreciable change in Ph for all practical purposes, but sicne the ratio (["Base"])/(["Salt"]) or (["Salt"])/(["Acid"]) changes, a slight decrease or increase in pH results. The volume of 0.2 m NaOH needed to prepare a buffer of pH 4.74 with 50 mL of 0.2 m acetic acid pH_(b) of CH_(3)COO^(-)=9.26 is :

P BAHADUR-IONIC EQUILIBRIUM-Exercise3A
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  2. Which may be added to one litre of water to act a buffer?

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  3. The pH of an acidic buffer mixture is:

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  4. The principal buffer present in human blood is

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  5. The ratio of dissociation constant of two weak acids HA and HB is 4. A...

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  6. The pK(a) of acteylsalicylic acid (aspirin) is 3.5. The pH of gastric ...

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  7. The reverse procees of neutralisation is:

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  8. When different types of salts have nearly same solubility product cons...

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  9. The solubility of AgI in NaI is lowest than that in pure water, becaus...

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  10. Which of the following is most soluble in water ?

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  11. The decreasing order of strength of the bases, OH^(-), NH(2)^(-), H-C-...

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  12. The best explanation for the solubility of MnS in dil. HCI is that:

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  13. pH for the solution of salt undergoing anionic hydrolysis (say CH(3)CO...

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  14. Solubility of BaF(2) in a solution of Ba(NO(3))(2), will be represente...

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  15. Which statement is correct ?

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  16. Fear or exitement, generally cause one to breathe rapidaly and it resu...

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  17. For neutralisation of HF+NaOH rarr NaF+H(2)O, heat released during neu...

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  18. The pH of 0.1 M solution of the following salts increases in the order

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  19. The pH of the solution obtained by mixing 10 mL of 10^(-1)N HCI and 10...

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  20. A cetrain buffer solution contains equal concentration of X^(-) and HX...

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