Respuesta :
Answer: CaO (s) + H₂O (l) ↔ CaOH₂ (s)
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The reaction that occurs when CaO can be used as a drying agent is CaO (s) + H₂O (l) ↔ CaOH₂ (s) .
What is drying agent?
A drying agent can also be referred to as desiccant and they are usually hygroscopic substance that help to sustains dryness in its compound.
Using CaO as a drying agent, which is formed by the application of water to the calcium oxide and calcium hydroxide will be formed in the process.
Learn more about drying agent at: https://brainly.com/question/25736513
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