Answer
The trend in this series is clearly in the sense of smaller ionic radius favoring greater solubility. Probably the smaller ion size results in much greater hydration energy.
The water solubilities of the sulfates increase in the order Ra < Ba < Sr < Ca < Mg.
Work Step by Step
The trend in this series is clearly in the sense of smaller ionic radius favoring greater solubility. Probably the smaller ion size results in much greater hydration energy.
The water solubilities of the sulfates increase in the order Ra < Ba < Sr < Ca < Mg.