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The P^(H) of an aqueous solution of NH4...

The `P^(H) ` of an aqueous solution of `NH_4 CN( K_a of HCN is 9.2 xx 10^(-10) & K_b of NH_4 OH is 1.8 xx 10^(-5)) `

A

` gt 7`

B

` lt 7`

C

` 7`

D

` 14`

Text Solution

Verified by Experts

The correct Answer is:
A
` pH =7+ ( (pKa- pKb)/(2) ) `
` =7+ [( (10 -log 9.2)- (5 - log 1.8))/(2) ]`
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AAKASH SERIES-IONIC EQUILIBRIUM -LECTURE SHEET (EXERCISE -III LEVEL -I (MAIN ) (Straight Objective Type Questions))
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  2. K(a) for HCN is 5 xx 10^(-10) at 25^(@)C . For maintaining a constant ...

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  3. pH of a mixture of HA and A^(-) buffer is 5. Kb of A^(-) =10 ^(-10 )...

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  4. A buffer solution contains 0.2 mole of NH4 OH and 0.2 mole of NH4 Cl...

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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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  7. Buffer capacity of acidic buffer solution is maximum when (1) P^(H)...

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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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  13. The nature of 0.1 M solution of sodium bisulphate is

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  14. In the titration of acetic acid versus sodium hydroxide , the pH of th...

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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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  16. The hydrolysis constant of CH3 COONa is given by

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  17. Hydrolysis constant of salt derived from strong acid and weak base is ...

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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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