Silver chloride (also called silver(I) chloride) is a chemical compound with chemical formula AgCl. It is a white crystalline solid. It is used to make photographic film as it turns darker where light is applied. It can be made by mixing an aqueous solution of silver nitrate with salt.
NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)