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English Translations » 信息处理 » Test you: 31 is not the correct answer, right?

Test you: 31 is not the correct answer, right?

2009-04-14View Original

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Quicklime, CaO, is a commonly used desiccant. Limestone is CaCO3 and it is insoluble in water; so how can it be used as a desiccant?
Reply #22009-04-14
Agreed. The desiccant should be calcium oxide (quicklime). Quicklime absorbs moisture from the air: CaO + H2O = Ca(OH)2; Ca(OH)2 + CO2 = CaCO3↓ + H2O
Reply #32009-04-14
The answer should be C (limestone)!
Reply #42009-04-14
I checked it, and what LZ said is correct; perhaps the answer in the book was wrong, and it has been corrected now. Thank you very much. This post was last edited by zhangyong6404 on 2009-4-14 at 22:00.]

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Translated at 2026-07-27 21:50:10

Original: https://bbs.hcbbs.com/thread-443275-1-1.html

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