<Dd> 2 Mg (s) + TiCl (l) → Ti (s) + 2 MgCl (s) </Dd> <P> However, other factors can come into play, such as in the preparation of metallic potassium by the reduction of potassium chloride with sodium at 850 ° C. Although sodium is lower than potassium in the reactivity series, the reaction can proceed because potassium is more volatile, and is distilled off from the mixture . </P> <Dl> <Dd> Na (g) + KCl (l) → K (g) + NaCl (l) </Dd> </Dl> <Dd> Na (g) + KCl (l) → K (g) + NaCl (l) </Dd>

Platinum copper and silver in order of reactivity