PST004 | 氢氧化钙试液 氢氧化钙饱和液 Calcium Hydroxide Test Solution / Limewater

氢氧化钙(calcium hydroxide)，无机化合物，化学式Ca(OH)2，俗称熟石灰或消石灰。是一种白色粉末状固体，加入水后，呈上下两层，上层水溶液称作澄清石灰水，下层悬浊液称作石灰乳或石灰浆。上层清液澄清石灰水可以检验二氧化碳，下层浑浊液体石灰乳是一种建筑材料。氢氧化钙在常温下是细腻的白色粉末，微溶于水，其澄清的水溶液俗称澄清石灰水，与水组成的乳状悬浮液称石灰乳。且溶解度随温度的升高而下降。不溶于醇，能溶于铵盐、甘油，能与酸反应，生成对应的钙盐。

运输和保存: 常温运输与保存，有效期:6个月

Limewater is the common name for a diluted solution of calcium hydroxide. Calcium hydroxide, Ca(OH)2, is sparsely soluble in water (1.5g/L at 25 °C[1]). Pure limewater is clear and colorless, with a slight earthysmell and an alkaline bitter taste of calcium hydroxide. The term lime refers to the alkaline mineral, and is unrelated to the acidic fruit. 

Limewater is prepared by stirring calcium hydroxide in pure water and filtering off the excess undissolved Ca(OH)2. When excess calcium hydroxide is added to limewater, a suspension of calcium hydroxide particles results, giving it a milky aspect, in which case it has the common
name of milk of lime. Milk of lime or a saturated solution of lime (limewater) has a pH of 12.4. lt is basic in nature.