Application of photochemical reaction of silver chloride
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The light sensitivity of the silver halides is key to the photographic process. Tiny crystals of all three of these compounds are used in making photographic film. When exposed to light, a chemical reaction darkens the film to produce an image.
AgCl, for example, consists of crystals of tightly packed ions of silver and chlorine, denoted Ag+ and Cl-. The "+" and "-" symbols tell us that Ag ion (Ag+) is missing one negatively charged electron and that Cl ion (Cl-) has an extra electron. When film containing Ag+ and Cl- is exposed to light energy, the chlorine ion's extra electron is ejected and then captured by a silver ion.
AgCl, for example, consists of crystals of tightly packed ions of silver and chlorine, denoted Ag+ and Cl-. The "+" and "-" symbols tell us that Ag ion (Ag+) is missing one negatively charged electron and that Cl ion (Cl-) has an extra electron. When film containing Ag+ and Cl- is exposed to light energy, the chlorine ion's extra electron is ejected and then captured by a silver ion.
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