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The 11 pages that link to Calcium oxide, each with the reason it gives.

• LimestoneRelated: Calcining limestone produces quicklime for construction, metallurgy, and chemical processes.

• CalciumRelated: Heating limestone converts its calcium carbonate into this reactive calcium compound.

• Calcium hydroxideRelated: Adding water to quicklime produces calcium hydroxide in an exothermic slaking reaction.

• Magnesium oxideCompared with: It is a closely related alkaline-earth oxide, but reacts with water more vigorously.

• Soda–lime glassRelated: It supplies lime, helping make the glass more resistant to water.

• Lime mortarRelated: Slaking quicklime produces the hydrated lime commonly used in mortar.

• Calcium carbideRelated: It is a key carbide-manufacturing input, unlike the carbide product itself.

• Potassium oxideCompared with: CaO has a one-to-one formula because calcium forms 2+ ions.

• Calcium sulfideCompared with: Replacing sulfide with oxide yields a related calcium compound with different reactivity and applications.

• Strontium oxideCompared with: Quicklime shares SrO’s basic chemistry but is far more widely used.

• Base anhydrideBroader topic: Its hydration is the standard example of a base anhydride forming a hydroxide.