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Given HF + H(@)O overset(K(g))hArr H(3)O...

Given `HF + H_(@)O overset(K_(g))hArr H_(3)O^(o+) + f^(o+)`
`F^(Theta) + H_(2)O overset(K_(b))hArr HF + overset(Theta)OH`
Which relation is correct?

A

`K_(b) = K_(w)`

B

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

C

`K_(b) = (1)/(K_(w))`

D

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

Text Solution

Verified by Experts

The correct Answer is:
B
Add two equaitons to get:
`K_(a) xx K_(b) = K_(w)`
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CENGAGE CHEMISTRY-IONIC EQUILIBRIUM-Ex 8.2
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  2. HCOOH and CH(3)COOH solutions have equal pH. If K(1)//K(2) is 4, the r...

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  3. 2H(2)O hArr H(3)O^(o+) + overset(Theta)OH,K(w) = 10^(-14) at 25^(@)C, ...

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  4. Which of the following expression is wrong?

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  5. For a 'C'M concentarted solution of a weak electrolyte A(x)B(y)alpha(d...

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  6. K(b) for NH(4)OH is 1.8 xx 10^(-5). The [overset(Theta)OH] of 0.1 M NH...

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  7. The dissociation constant of monobasic acids A, B,C and D are 6 xx 10^...

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  8. The molarity of NH(3) of pH = 12 at 25^(@)C is (K(b) = 1.8 xx 10^(-5))

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  9. K(a) of HA at 25^(@) is 10^(-5). If 0.1mol of this acid is dissolved i...

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  10. For a polyprotic acid, H(3)PO(4) its three dissociation constanst K(1)...

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  11. Given HF + H(@)O overset(K(g))hArr H(3)O^(o+) + f^(o+) F^(Theta) + H...

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  12. A certain weak acid has a dissociation constant 1.0xx10^(-4). The equi...

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  13. The percentage error in [H^(o+)] provided by 10^(-8)M HC1, if ionisati...

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  14. H(3)BO(3) is :

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  15. The enthalpy change for first proton neutralisation of H(2)S is -37.1k...

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  16. The factor by which the degree of ionisation of 200mL of 0.1M benzoic ...

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  17. The concentration of CO(2) in atmosphere is 88ppm. If all of the CO(2)...

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  18. A solution of a weak monoprotic acid has dissociation constant K(a). T...

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  19. Two weak acids HX and HY have K(a) values 1.75 xx 10^(-5) and 1.3 xx 1...

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  20. H(2)S behaves as a weak diprotic acid in aqueous solution. Which of th...

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