The reaction between potassium and chloride, as represented by the equation K + Cl → KCl, can be classified as a single displacement or a redox reaction.
In this reaction, potassium (K) displaces or replaces the chloride ion (Cl) in the compound to form potassium chloride (KCl). The potassium atom loses an electron to form a potassium ion (K+), while the chloride ion gains an electron to form a chloride ion (Cl-). This transfer of electrons indicates a redox (oxidation-reduction) reaction.
Additionally, this reaction can be classified as a synthesis or combination reaction since two elements (potassium and chlorine) combine to form a compound (potassium chloride).