Provide the chemical formulas for Gypsum,Epsom salt,and Barite.

$CO_2$ is passed through lime water. Initially,the solution turns milky and then becomes clear upon continued bubbling of $CO_2$. The clear solution is due to the formation of:

Which of the following sulphates has the highest solubility in water?

The halides of alkaline earth metals form hydrates such as $MgCl_2 \cdot 6H_2O$,$CaCl_2 \cdot 6H_2O$,$BaCl_2 \cdot 2H_2O$,and $SrCl_2 \cdot 2H_2O$. What does this indicate about the halides of group $2$ elements?

Which of the following is the correct order of solubility for the sulfates of alkaline earth metals?

Which of the following ions has a higher hydration enthalpy than the $Mg^{2+}$ ion?