《科学课》2004年第10期刊登的《二氧化碳与澄清石灰水实验小巧门》一文中提到的“先用热水溶解氢氧化钙,因为热水既加快溶解速度又提高溶解度”,这种说法是错误的。因为固体物质的溶解度,绝大多数都随温度的升高而增大,但少数物质恰好相反,氢氧化钙便是其中的一种。氢氧化钙的 “Science class” 2004 the tenth issue of “carbon dioxide and clarified lime water experimental small door,” a article mentioned in the “hot water to dissolve calcium hydroxide, because both hot water to speed up the dissolution rate and improve solubility”, this The statement is wrong. Because the solubility of solid matter, the vast majority of the increase with temperature, but a small number of substances on the contrary, calcium hydroxide is one of them. Calcium hydroxide