Question
Why is potassium chloride sometimes violet instead of pure white.
Solution
when a crystal of KCl is heated in an atomsphere of potassiuim vapour the Katoms lose electron to form K+ ions. The released electron diffuse into the crystal and occupy anionic site (F- centre)
These electron impart violet colour to the KCl crystal.
These electron impart violet colour to the KCl crystal.
