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pH of 0.01 M HS^(-) will be:...

`pH` of `0.01 M HS^(-)` will be:

A

`pH=7+(pK_(a))/(2)+(log C)/(2)`

B

`pH=7-(pK_(a))/(2)+(log C)/(2)`

C

`pH=7+(pK_(1)+pK_(2))/(2)`

D

`pH=7+((pK_(a)+pK_(b)))/(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`HS^(-)+H_(2)OhArrH_(2)S+OH^(-)`
`:. [OH^(-)]=Ch=sqrt((K_(w)C)/(K_(a))`
`:. [H^(+)]=(K_(w))/(sqrt((K_(w).C)/(K_(a))))=sqrt((K_(w)K_(a))/(C))`
or `pH=1//2[pK_(w)+pK_(a)+log C]`
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A2Z-IONIC EQUILIBIUM-Salt Hydrolysis
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  2. Which of the following salts when dissolved in water with get hydrolys...

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  9. Which is the correct alternate for hydrolysis constant of NH(4)CN?

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  10. Which one of the following salt is most acidic in water?

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  11. Which of the following aqueous solution will have a pH less than 7.0 ?

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  12. Hydrolysis constant for a salt of weak acid and weak base would be

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  13. Which of salt will give basic solution on hydrolysis?

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  14. Which salt can be classified as an acid salt?

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  15. HA is a weak acid and BOH is a weak base. For which of the following s...

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  16. pH of water is 7. When a substance Y is dissolved in water, the pH bec...

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  18. The pH of 0.02 M NH(4)Cl (aq) (pK(b)=4.73) is equal to

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