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For a conjugated acid-base pair the rela...

For a conjugated acid-base pair the relation `b//w K_(a)` and `K_(b)`

A

`K_(a).K_(b) = 1`

B

`K_(a)//K_(b) = K_(w)`

C

`K_(a) xx K_(b) = K_(w)`

D

`K_(a).K_(b) = 14`

Text Solution

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The correct Answer is:
C
`Ka xx Kb = Kw`
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The dissociation of weak electrolyte (a weak base or weak acid) is expressed in terms of Ostwald's dilution law. An acid is substance which furnishes a proton or accepts an electron pair, where a base is proton acceptor or electron pair donor. Stronger is acid, weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base (K_(b)) are related by K_(w)=K_(a)xxK_(b) , where K_(w) is ionic product of water equal to 10^(-14) at 25^(@)C . The numerical value of K_(w) however increase with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(-14) . Thus the [H^(+)] in a solution is expressed as: [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solution are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. The pH of II gp. filtrate during III gp. basic radicals precipitation in qualitative anlysis is maintained by using a buffer solution of:

The dissociation of weak electrolyte (a weak base or weak acid) is expressed in terms of Ostwald's dilution law. An acid is substance which furnishes a proton or accepts an electron pair, where a base is proton acceptor or electron pair donor. Stronger is acid, weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base (K_(b)) are related by K_(w)=K_(a)xxK_(b) , where K_(w) is ionic product of water equal to 10^(-14) at 25^(@)C . The numerical value of K_(w) however increase with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(-14) . Thus the [H^(+)] in a solution is expressed as: [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solution are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. Which of the following solution is most important buffer for human living ?

The dissociation of weak electrolyte (a weak base or weak acid) id expressed in terms of Ostwald dilution law. An acid is a substance which furnishes a proton or accepts an electron pair whereas a base is proton acceptor or electron pair donor. Storonger is the acid weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base are related by (K_(w)=K_(a)xxK_(b) , where K_(w) is ionic prodcut of water equal to 10-14 at 25^(@) C. The numerical value of K_(w) however increases with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(14) .Thus, the [H^(+)] in a solution is expressed as : [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solutions are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. Which of the following solution is most important buffer for human living?

Label the one conjugate acid-base pair in the following reaction.

NARAYNA-IONIC EQUILIBRIUM-Level-I
  1. The ionic product of wate is 10^(-14). The H^(+) ion concentration in ...

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  2. For a strong acid

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  3. For a conjugated acid-base pair the relation b//w K(a) and K(b)

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  4. For a dibasic acid, H(2)A hArr HA^(-) + H^(+) (K(1)) HA^(-) hArr A^(...

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  5. For H(3)PO(4), H(3)PO(4) hArr H(2)PO(4)^(-) + H^(+) (K(1)) H(2)PO(4...

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  6. 0.4g of NaOH is present in one litre of the solution shows that H^(+) ...

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  7. The strength of acid is highest in

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  8. If K(a)=10^(-5) for a weak acid, then pK(b) for its conjugate base wou...

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  9. The pH of a 0.005 M H(2)SO(4) solution is

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  10. The pH of a 0.001 M aqueous solution of sodium hydroxide will be

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  11. The pH of 0.001 M HCN is

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  12. The pH of solution is 4.0 what should be the change in the hydrogen io...

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  13. The P^(H) of HCl is 5, its is diluted by 1000 times Its P^(H) will be

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  14. The pH of gestric juice is normally

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  15. A solution of pH = 9 is one thousand times as basic as a solution of p...

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  16. pH of one litre solution containing 40gm of NaOH

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  17. The p^(H) of a 1 lit solution is 2. It is diluted with water till it b...

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  18. If pH of solution of NaOH is 12.0 the pH of H(2)SO(4) solution of same...

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  19. pH of 10 M HCl (aq) on Sorenson's scale is :

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  20. 100 mL of 0.2 N NaOH is mixed with 100 mL 0.1 NHCl and the solution is...

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