What is the IUPAC name for KCl?

The IUPAC name for KCl is potassium chloride. This name accurately reflects the composition of the compound, which consists of potassium (K) ions and chloride (Cl) ions. In this nomenclature, the cation is named first, followed by the anion, which is a standard convention in naming ionic compounds.

In this case, potassium is a metal and takes the form of a cation, while chloride is a non-metal that has gained an electron, resulting in an anion. Using the name "potassium chloride" correctly identifies the two components of the compound in the order typically used in IUPAC naming conventions.

Other options such as chloride potassium incorrectly position the anion before the cation, which is not how ionic compounds are typically named. "Potassium chlorate" refers to a different compound that includes a polyatomic ion rather than just simple chloride. Lastly, "mono-potassium chloride" is not a commonly accepted term for KCl, as "mono" is typically used in molecular compounds to indicate the presence of a single atom, which is not required in the naming of ionic compounds like KCl. Thus, potassium chloride is the most accurate and standard name for KCl according to IUPAC conventions