An ionic compound can be formed through the existence of valency above the compound e.g NH4 which have +3 as it's ionic charge
B: quantity of solute with a specific volome of solvent.
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Basically since potassium chloride is an ionic compound as it consists of a metal and a nonmetal, the potassium atom will donate one of its valence electrons to chlorine that will accept it and as a result produce oppositely charged ions, where the K + ion and the Cl - ion will attract forming an ionic bond. The compound that results is potassium chloride.