The chemical formula for potassium chloride is KCl. It is an ionic compound formed by the transfer of electrons between the atoms of potassium and chlorine. It is white crystalline solid at room temperature.
An atom of potassium loses an electron to form a positive ion, while the chlorine atom gains an electron to form a negative ion. The electrostatic force of attraction between the positive potassium ion and the negative chloride ion leads to the formation of an ionic bond. This allows the formation of a molecule of potassium chloride. Potassium chloride has a three-dimensional lattice structure in its crystals, which is similar to common salt sodium chloride. Potassium chloride dissolves in water and has a melting point of 1,418 degrees Fahrenheit.