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They turn black
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What happens when silver chloride is exposed to air?
Silver chloride is decomposed under the action of UV radiation and air.
What happens when silver exposed to air?
Tarnish.
Why did they use chemicals and glass plates in early photography?
until celluloid was invented Glass plates were used because it was the only way to suspend the emulsion evenly and allowed light to pass through. It was easier to handle. Some glass plates were large and were put into contact with paper to create a positive image. Chemistry was used to convert the silver halides in the emulsion to visible black metallic silver halides. When light was shone through the glass the black metallic silver halides stopped the light and the paper was exposed where the light pass by the halides. This caused the material being exposed to show a positive image.
Is silver halides a metal or alloy?
Siver Halides are neither a metal or an alloy. They are a salt.
What Metal or Alloy that turns black when exposed to light and is used as film Coating?
Iridium is a metal that turns black when exposed to light and is used as a film coating for various applications, including optics and electronics.
How are black and white photographs developed and printed?
Black and white photographs are developed using a chemical process that involves several steps. First, the exposed film or photographic paper is submerged in a developer solution, which reduces the exposed silver halides to metallic silver, creating an image. After development, the photograph is rinsed and then fixed in a solution to remove any unexposed silver halides, making the image permanent. Finally, the print can be washed to eliminate any remaining chemicals and then dried.
What happens to sliver when exposed to oxygen?
When silver is exposed to oxygen, it can undergo a chemical reaction and form a layer of silver oxide on its surface. This can cause the silver to tarnish, leading to a darkening or discoloration of the metal. Regular polishing can help remove this oxidation layer and restore the shine of the silver.
What property of ionic compounds explains why silver halides can be used in photography?
Silver halides absorb light to form elemental silver. This is the basis for the photographic film. This is an unusual reaction and is certainly not common to all ionic compounds. Silver halides are also unusually insoluble, again not a common property of ionic compounds. In fact silver halides have quite a lot of covalent character! I am sure teacher has something in mind but its certainly not in mine.
When a photographic film is exposed to light then salt on the film breaks down what meatel is formed?
The short answer is silver. In black and white film and print technology, the silver halides created by exposing the film to light in the camera or on paper under an enlarger, are reduced to silver by the developer and then the remaining halides are washed from the film during the fixing process. In some color photography, ALL of the silver is washed from the film and replaced by dyes introduced during the processing.
Which silver halide is most soluble?
Solubility of the silver halides decreases down the group.The solubilities of silver halides decreases down the periodic table:AgF :Ksp=205AgCl:Ksp=1.8×10−10AgBr:Ksp=5.2×10−13AgI :Ksp=8.3×10−17
What is the developing chemical in a pin hole camera photo?
Silver salts. Mainly silver halides.
What will react with alcoholic silver nitrate?
Alcoholic silver nitrate reacts with alkyl halides to form silver halide and alkyl nitrate compounds. This reaction is commonly used in organic chemistry to identify the presence of alkyl halides in a sample.
