Science
Comment on the following statements :
(a) Bee sting is treated with baking soda paste whereas wasp sting is treated with dilute vinegar.
(b) Farmers treat soil with quicklime when tilling.
(c) Ancient sculptures and marble structures are conserved by treating them with certain chemicals.
Acids Bases Salts
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Answer
(a) Bee stings inject formic acid into the skin so to neutralize this acid, a mild base such as baking soda (sodium bicarbonate) is applied. Wasp stings, on the other hand, are alkaline in nature therefore, they are treated with a mild acid like dilute vinegar (acetic acid) to neutralize the alkali.
(b) Some soils become too acidic due to continuous use of fertilizers or natural processes. Quicklime (calcium oxide) is a basic substance and when added to acidic soil, it neutralizes the excess acid, restoring the soil’s pH to a level suitable for crop growth. Thus, it helps to improve the fertility and productivity of the soil.
(c) Marble and limestone are mainly composed of calcium carbonate (CaCO3). Over time, they react with acidic gases like sulphur dioxide (SO2) and carbon dioxide (CO2) in the atmosphere, forming calcium sulphate or calcium bicarbonate, which damage the surface.
To protect them, they are treated with chemicals such as ammonium bicarbonate or calcium hydroxide, which neutralize acids and restore the protective layer. This treatment prevents further corrosion and helps preserve historical monuments.
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