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  • Can someone help me with this, Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy ?

Which one of the following alkaline earth  metal sulphates has its hydration enthalpy greater than its lattice enthalpy ?

  • Option 1)

      CaSO4   
     

     

  • Option 2)

     BeSO4   
     

  • Option 3)

    BaSO4   
     

  • Option 4)

     SrSO4   

 

Answers (1)

best_answer

As we learnt in

Solubility of sulphates of alkaline metals -

Solubility in water decreases from Be to Ba

- wherein

Lattice energy is constant whereas hydration energy decreases from Be^{2}^{+}\ to\ Ba^{2}^{+}

 

Solubility of sulphate in water decreases from Be\:to\:Ba

Solubility order

 \Rightarrow BeSO_{4}> MgSO_{4}> CaSO_{4}> SrSO_{4}> BaSO_{4}


Option 1)

  CaSO4   
 

 

This option is incorrect.

Option 2)

 BeSO4   
 

This option is correct.

Option 3)

BaSO4   
 

This option is incorrect.

Option 4)

 SrSO4   

This option is incorrect.

Posted by

prateek

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