Slaked lime is chemically calcium hydroxide or Ca (OH)2. A saturated solution of calcium hydroxide in water is known as lime water. When carbon dioxide is passed through a freshly prepared solution of lime water, then it turns milky due to the formation of calcium carbonate, which is insoluble in water. Following is the chemical equation for a reaction
Ca(OH)2 +co2> CaCO3 +H2O
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