Calcium-containing acidic solution

I want to prepare an acidic solution containing Ca ions. I thought about dissolving calcium sulphate, acetate or phosphate in $\pu{2 M}$ $\ce{H2SO4}$ or $\ce{H3PO4}$ solutions, but it seems that $\ce{Ca}$ cations react with sulphate anions. 


Is it true? And is there any way to make a $\ce{Ca}$-containing acidic solution?




You could dissolve calcium chloride in water and add a small amount of HCl.


 2