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Calcium sulfate is sparingly soluble in water. describe and explain what would you see when few cm^3 of concentrated of Na2SO4 (aq) were added to a solution of CaSO4 (aq).

The answer says CaSo4 (s) will be formed but why? My answer is that since Na2SO4 is soluble in water it will react with water, is it correct? and why solid is formed?

 

 

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