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Chemistry of the environment: WRP_Avantika_13.5.22, Water (1) - Coggle…
Chemistry of the environment: WRP_Avantika_13.5.22, Water (1)
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Water may contain...
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Plastics, sewage (Disposed by humans)
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Tests for water:
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Another test is to dip blue cobalt chloride paper into the liquid. If the paper turns pink, the liquid contains water.
Purity of water:
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If it is an unknown sample, a graph of temperature against time can be plotted.
Water pollution:
Pollution is a modification that takes place in our environment, water or air, caused by human influence suck as releasing substances into our water and air.
When water falls through the atmosphere, it dissolves harmful gases like nitrous oxide and sulfur dioxide from the polluted air. They react with water to form acidic compounds which result in acid rains. These rains destroy structures made up of metals like calcium. The water from acid rains can sweep into the ground, and could end up in ponds and lakes (could lead to an increased acidity of the water).
Nitrates and phosphates from excess fertilizers dissolve into the water and can end up in an enclosed lake/ pond. This can cause eutrophication (see later).
Metals compounds of Mercury and Cadmium from industrial waste can get dissolved in the water, if not disposed off properly. These compounds are highly toxic. However, it should be noted that some metal compounds are beneficial: calcium compounds in water help in a healthy growth of teeth.
Human waste from sewage can end up in water if not disposed off properly. Harmful organisms can encourage the spread of waterborne diseases.
Insoluble impurities such as plastic and oil can pollute water. Impurities like plastic can be detrimental to all the aquatic as well as human lives on this planet.
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