Why is guard tube containing calcium chloride is suggested to be used if the climate is humid? (NCERT Activity 2.9)
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This activity we need for the conclusion that the h+ ion is produced only in the presence of water. during a humid climate, we may not get the proper result as the gas evolved may react with the dry litmus paper using the moisture from the air. therefore, guard tube containing calcium chloride is suggested to be used if the climate is humid to dry the gas
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A calcium chloride drying tube contains calcium chloride pellets at the top and bottom, held in place by plugs made of glass wool. As air flows through the wool and the calcium chloride, it is de-humidified so that the air entering the reaction chamber contains little or no moisture.A drying tube relieves pressure inside the reaction vessel by allowing gases to escape while preventing moisture from contaminating the reactants.
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