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Copper Carbonate: Blue Vitriol Precipitated with Washing Soda
Pour washing soda into a solution of copper sulfate and a pale blue sludge falls out; warm it and it turns into a dense green powder. George Fownes (1856) gives this as the way the pigment is made; it is close in make-up to the mineral malachite. Potters and glassmakers use it as a copper colour.
The picture: a heap of basic copper carbonate powder.
初学者
A day with drying
说明
1
1
Two solutions
Two solutions
Dissolve the copper sulfate in one beaker of warm water and the washing soda in another.
此步骤所需材料：
五水硫酸铜（CuSO4·5H2O）250 克
洗涤碱290 克
水2 升所需工具：
等臂天平
玻璃烧杯
电热板
化学防溅护目镜
橡胶手套2
2
Pour in the soda
Pour in the soda
Pour the soda slowly into the copper, stirring; it froths as gas comes off. A pale blue sludge falls out. Stop when more soda no longer makes any.
所需工具：
玻璃烧杯
玻璃搅拌棒化学防溅护目镜橡胶手套3
3
Warm it green
Warm it green
Warm the mixture gently and stir. Fownes: the precipitate becomes dense and turns green.
所需工具：
玻璃烧杯电热板玻璃搅拌棒4
4
Wash and dry
Wash and dry
Filter it, wash it several times with clean water to take out the sodium sulfate, and dry it in a dish at low heat. Store the powder in a closed jar.
此步骤所需材料：
水2 升所需工具：
滤纸
带颈玻璃漏斗
蒸发皿
玻璃罐化学防溅护目镜橡胶手套5
5
Soda for the copper
Soda for the copper
正在加载 Jupyter 笔记本…
6
6
Limits
Limits
The precipitation and the change to green are Fownes's; the quantities are ours. Copper salts are harmful if swallowed; do not breathe the dry powder.
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