Equation for K_(sp) and its unit for the sparingly soluble salt Al(OH)

1.	Equation for K_(sp) and its unit for the sparingly soluble salt Al(OH)_3 are …..
Answer» `4 S^4 , M^3` `4 S^3 , M^3` `27 S^4 , M^4` `S^2 , M^2` SOLUTION :Suppose the water solubility of `Al(OH)_3` is S MOLAR, so in solution at equilibrium, `underset"Concentration at equilibrium"(Al(OH)_(3(s))) HARR underset"SM"(Al_((aq))^(3+))+ underset"3SM"(3OH_((aq))^(-))` `K_(sp)=[Al^(3+)][OH^-]^3` =`[SM][3SM]^3=27S^4 , M^4`

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