H+ and I- are the spectator ions.
Ca2+
Calcium is an element so it does NOT have any formula. But it has a symbol Ca. It is very reactive to be found in nature as free element, so it occurs as compound which contain Ca2+ ions, like CaCO3(limestone) and CaSO4(gypsum).
Ca2+ and 2 Cl-
they cannot bond together, they are separate .
Zn and Ca both have double positive (2+) ions: Zn2+ and Ca2+ but other properties are different.
CaSO4 is an ionic compound because it contains two ions namely CA2+ and SO42-.
Complete Ionic Equation. 2K+(aq) + SO42-(aq) + Ca2+(aq) + 2I-(aq) --> 2K+(aq) + 2I-(aq) + CaSO4(s) Net Ionic Equation Minus the Spectator Ions K+ and I-. Ca2+(aq) + SO42-(aq) --> CaSO4(s)
The net ionic equation is SO42- + Ca2+ CaSO4.
The net ionic equation is SO42- + Ca2+ CaSO4.
2H+ + SO42- + Ca2+ + 2I- CaSO4 + 2H+ + 2I
Ca2+(aq) + SO42-(aq)- --> CaSO4(s) is the net ionic equation.
2Na+(aq) + SO42-(aq) + Ca2+(aq) + 2Cl-(aq) CaSO4(s) + 2Na+(aq) + 2Cl-(aq)
The ion-ion bond in CaSO4 is stronger than in NaCl because of the higher charges on the cation and anion. Be careful in making this argument. The ion-dipole forces of Ca2+ -H2O and SO42- - H2O might actually be stronger than that of Na+ -H2O and Cl- -H2O due to the high charges on Ca2+ and SO42- . However the strengths of the ions-dipole interactions do not match (or exceed) the strength of the Ca2+ -SO42- ionic bond.
2H+ + SO42- + Ca2+ + 2I- CaSO4 + 2H+ + 2I-
2H+ + SO42- + Ca2+ + 21 > CaSO4 + 2H+ + 21-
SO42-(aq) + Ca2+(aq) ---> CaSO4(s)
Plaster fof Paris is CaSO4.0.5H2O this is ionic and contains the Ca2+ and SO42- ions and water molecules. The SO42- ion is held together by covalent bonds as is the water.