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Lime Water: Slaked Lime Stirred into Water and Filtered Clear
Lime water is a clear solution of calcium hydroxide in water. Only a little dissolves, about 1.5 g per litre, so stir in more slaked lime than that, let it stand, and filter off the milky excess. It is alkaline: keep it off skin and out of eyes.
The picture: our diagram, milky mixture, filtering, clear lime water.
初学者
Overnight
说明
1
1
Mix
Mix
Stir slaked lime into clean water in a jar until it is milky, with lime left undissolved. Wear gloves and glasses.
此步骤所需材料:
熟石灰10 克
水2 升所需工具:
玻璃罐
木勺
等臂天平
橡胶手套
安全眼镜2
2
Stand
Stand
Cover the jar and let it stand overnight so the excess settles.
所需工具:
玻璃罐3
3
Filter
Filter
Pour the liquid off the sediment through filter paper laid in a strainer. The clear filtrate is lime water. Keep it in closed bottles.
所需工具:
滤纸
滤网
带盖子的玻璃瓶
橡胶手套4
4
How much lime dissolves?
How much lime dissolves?
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