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Assertion (A): The pH of a buffer soluti...

Assertion (A): The pH of a buffer solution containing equal moles of acetic acid and sodium acetate is 4.8 (`pK_(a)` of acetic acid is 4.8).
Reasons (R): The ionic product of water at `25^(circ)C is 10^(-14) mol^(2)L^(-2)`.
The correct answer is

A

Both (A ) and (R ) are true and (R ) is the correct explanation of (A )

B

Both (A) and (R ) are true and (R ) is not the correct explanation of (A)

C

(A ) is true but (R ) is false

D

(A ) is false but (R ) is true

Text Solution

Verified by Experts

The correct Answer is:
B
`P^(H) = PK a +log "" (S)/(A) =pKa (because S = A ) `
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AAKASH SERIES-IONIC EQUILIBRIUM -PRACTICE SHEET (EXERCISE -III LEVEL -I (MAIN) (Straight Objective Type Questions))
  1. When 100 ml of 0.4 M CH3 COOH is mixed with 100 ml of 0.2 M NaOH , th...

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  2. An acidic buffer contains

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  3. Assertion (A): The pH of a buffer solution containing equal moles of a...

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  4. Assertion (A): The aqueous solution of CH(3)COONa is alkaline in natur...

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  5. The hydrolysis constant of CH3 COONa is given by

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  6. For a conjugate acid -base pair , Ka and Kb are related as

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  7. The pH of the mixture of 25 ml of 0.01 M of CH3 COOH (Ka of CH3 COOH =...

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  8. To a buffer solution of CH(3),COOH and CH(3),COONa, some HCI is added....

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  9. An acidic buffer contains 0.06 M salt and 0.02 M acid . The dissociati...

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  10. Solution of 0.1 N NH4 OH and 0.1 N NH4 Cl "has " P^(H) 9.25 . Then ...

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  11. For acetic acid and sodium acetate buffer, addition of which of the fo...

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  12. A solution consists of 0.2 M NH4 OH and 0.2 M NH4Cl . If Kb of NH4 ...

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  13. 50 ml of 0.1 M solution of sodium acetate and 50 ml of 0.01 M acetic ...

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  14. When 100 ml of 0.4 M CH3 COOH is mixed with 100 ml of 0.2 M NaOH , th...

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  15. An acidic buffer contains

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  16. Assertion (A): The pH of a buffer solution containing equal moles of a...

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  17. Assertion (A): The aqueous solution of CH(3)COONa is alkaline in natur...

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  18. The hydrolysis constant of CH3 COONa is given by

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  19. For a conjugate acid -base pair , Ka and Kb are related as

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  20. The pH of the mixture of 25 ml of 0.01 M of CH3 COOH (Ka of CH3 COOH =...

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