Between the Ca2 + cation and the SO4 2- sulfate ion, a reaction in an aqueous solution is possible, due to the fact that when they interact, they give a compound that is poorly soluble in water – calcium sulfate CaSO4. For example:
* CaCl2 + H2SO4 = CaSO4 + 2 HCL – molecular equation.
Ca2 + + 2 Cl- + 2 H + + SO4 2- = CaSO4 + 2 H + + 2 Cl- – complete ionic equation.
Ca2 + + SO4 2- = CaSO4 – short ionic equation.
* Ca (NO3) 2 + MgSO4 = CaSO4 + Mg (NO3) 2 – molecular equation.
Ca2 + + 2 NO3- + Mg2 + + SO4 2- = CaSO4 + Mg2 + + 2 NO3 – – complete ionic equation.
Ca2 + + SO4 2- = CaSO4– short ionic equation
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