Under what soil conditions do you think a farmer would treat the soil of his fields with quicklime (calcium oxide), or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?
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Solution
Calcium oxide, calcium hydroxide and calcium carbonate are all bases (pH > 7), and hence, they must be used only in cases where the soil is too acidic (pH < 7). They help in neutralising the acidity of the soil and assist in bringing the pH closer to 7.
Concept: Concept of Ph Scale
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