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Given HF + H2O hArr H3O^(+) + F^(-) :...

Given `HF + H_2O hArr H_3O^(+) + F^(-) : K_a`
` " " F^(-) +H_2O hArr HF +OH^(-) ,K_b `
Which of the following relations is correct ?

A

`K_(b)=K_(w)`

B

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

C

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

D

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

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