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A buffer solution contains 0.2 mole of ...

A buffer solution contains `0.2 ` mole of `NH_4 OH ` and `0.2 `mole of `NH_4 Cl `per litre. The `PK_b ` of ` NH_4 OH ` is `4.75 The pH of the buffer will be

A

`4.75`

B

` 5.75`

C

`9.25`

D

`2.25`

Text Solution

Verified by Experts

The correct Answer is:
C
` pOH =pK_b +log "" ([S])/([B]) =4.75 +log ""(0.2)/(0.2) = 4.75`
`rArr pH = 14 -4.75 =9.25`
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AAKASH SERIES-IONIC EQUILIBRIUM -LECTURE SHEET (EXERCISE -III LEVEL -I (MAIN ) (Straight Objective Type Questions))
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  5. From the following table {:("Buffer solution ", "Vol .of 0.1 M weak ac...

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  6. Which buffer solution has maximum pH?

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  8. When 0.02 mole of an alkali is added to an acid buffer , the pH change...

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  9. Aqueous solution of KCI is neutral because

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  10. Assertion (A) : Aqueous solutions of ZnSO4 is neutral. Reason ( R ...

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  11. (A): Aqueous solution of Na(2)CO(3) is acidic in nature (R): Na^(+) ...

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  12. The no.of hydroxyl ions produced by one molecule of Na(2),CO(3) , on h...

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  15. The P^(H) of an aqueous solution of NH4 CN( Ka of HCN is 9.2 xx 10^(-...

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  18. The hydrolysis constant of NaX (Ka of HX is 2xx 10 ^(-6)) is

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  19. The P^(H) of 0. 1M solution of the following compounds increases i...

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  20. Assertion (A): Aqueous solution of ammonium acetate is neutral Reaso...

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