Why does calcium chloride do not form?

Calcium chloride does form; it is a well-known ionic compound composed of calcium ions (Ca²⁺) and chloride ions (Cl⁻). It is commonly used for de-icing roads, as a drying agent, and in various industrial applications. If you meant to ask why it might not form under certain conditions, it could be due to insufficient calcium or chloride availability, or unfavorable temperature and pressure conditions that inhibit its formation.