2NaOH+CA(NO3)2=2NANO3+CA(OH)2 CA(OH)2+H2SO4=CaSO4+2H2O
2NaOH+Ca(NO₃)₂=2NaNO₃+Ca(OH)₂ Ca(OH)₂+H₂SO₄=CaSO₄+2H₂O