1.

Which of the following statement are correct regarding the simultaneous solubility of AX_2 and BX_2 in water at 25^@ C ? [Given K_(sp)(AX_2)=3.888xx10^(-9), K_(sp)(BX_2)=1.944xx10^(-8)]

Answer»

The concentration of `X^-` ion in the solution is `1.296xx10^(-5)M`
The simultaneous solubility of `AX_2` is `3xx10^(-4)M`
The simultaneous solubility of `BX_2` is `1.5xx10^(-3)M`
The concentration of `X^-` ion in the solution is `7.2xx10^(-3)M`

Solution :`(K_(sp)(AX_2))/(K_(sp)(BX_2))=(3.888xx10^(-9))/(1.944xx10^(-8))=1/5=S/(5S)`
`AX_2hArr undersetSA^(2+)+UNDERSET(2S+10S)(2X^(-))`
`BX_2hArr underset(5S)B^(2+)+underset(10S+2S)(2X^(-))`
`K_(sp)(AX_2)=S(12S)^2=3.888xx10^(-9) :. S=3xx10^(-4)M`
Solubility of `BX_2=5S=1.5xx10^(-3) M`
`[X^(-)]=12S =3.6xx10^(-3)M`


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