5.7 Decomposition Reaction of Chemical Solution
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Transcript of 5.7 Decomposition Reaction of Chemical Solution
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5.7Chemical reactions that occur in the presence of light
Azneezal Ar-RashidSmk Sri Aman
95007 Sri Aman, Sarawak
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Photosynthesis
Sunlight Breaks the water molecule into
hydrogen and oxygen Chlorophyll
Absorb light energy Carbon dioxide
Absorbed through stomata Changes into carbohydrate
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Oxygen Oxygen is released
Water Water is absorbed
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Photosynthesis equation Carbon dioxide + water + sunlight (chlorophyll)glucose + Oxygen
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About photosynthesis
In photosynthesis, sunlight is absorbed by the chlorophyll in the leaves and a biochemical reaction is carried out
The importance of photosynthesis is : To maintain the percentage composition
of oxygen and carbon dioxide in the atmosphere
To provide food for plants
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Decomposition reaction of chemical solution
Chlorine water In the presence of sunlight, chlorine is
decomposed into hydrochloric acid and oxygenwater + chlorine hydrochloric acid + hypochlorous
hypochlorous (light)oxygen
Without sunlight, no reaction will take place
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Sodium hypochlorite solution Sodium hypochlorite solution is
decomposed into sodium chloride and oxygen in the presence of sunlight
sodium hypochlorite (light) sodium chloride + oxygen
No reaction will take place with out sunlight
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Photographic paper / silver chloride Silver chloride is decomposed into
silver and chlorine gas when exposed to light
silver chloride (light)chlorine