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熟石灰和水反應的熱效應
熟石灰和水反應的熱效應
更新时间:2025-11-07 02:27:11

  熟石灰(氫氧化鈣)與水不反應;但溶解在水中要放熱。生石灰(氧化鈣)與水反應,劇烈放熱;熟石灰是Ca(OH)2,跟水一起遇到空氣中的CO2,生成固體CaCO3。 其取小塊,置于稀鹽酸中看是否産生無色無味氣體,倘若産生,則将其氣體同如澄清的石灰水,若水邊混濁,則證明氣體是CO2,固體含碳酸根。

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