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A solution is saturated with respect to ...

A solution is saturated with respect to `SrCO_3 and SrF_2.` The `[CO_3^(2-)]` was found to be ` 1.2 xx 10^(-3) M. ` The concentration of `F^(-) ` in the solution would be : ` (K_(sp) of SrCO_3 = 7xx 10^(-10) K_(sp) of SrF_2 =8xx 10^(-10))`

A

` 1.3 xx 10^(-3) M`

B

` 2.6 xx 10^(-2)M`

C

` 3.7 xx 10^(-2) M`

D

` 5.8 xx 10^(-7) M`

Text Solution

Verified by Experts

The correct Answer is:
C
`[Sr^(+2) ][CO_3^(2-)] =KsP_1 ,[Sr^(+2) ][F^(-) ] ^(2) = Ksp_2`
`rArr [F^(-) ]^(2) =(Ksp_2)/(Ksp_1) xx [CO_3^(2-)]`
` [F^(-)]^(2) =(8xx 10^(-10))/( 7 xx 10 ^(-10)) xx 1.2 xx 10 ^(-3)`
` [F^(-)] =3.7 xx 10 ^(-2) `
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