1.

Write the relationship between K_(sp) and S of an A_(2)B type of salt.

Answer»

Solution :Consider an electrolyte `A_(2)B`, WHOSE SOLUBILITY is S MOL `DM^(-3)`. In a saturated solution,
`A_(2)B_((s))hArr2A^(+)+B^(2-)`
`therefore[A^(+)]=2S" mol "dm^(-3)and(B^(2-))=S" mol "dm^(-3)`
`K_(sp)=[A^(+)]^(2)[B^(2-)]=(2S)^(2).S=4S^(3)`
`thereforeK_(sp)=4S^(3)`


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