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在这里向大家介绍的一种金和银的提纯法,是本人参考了过去金银商店里所采用的一般方法,并经试验而给以改进所得到的,可供中等学校的实验室试用。金的提纯法:一般金件中的杂质,极大部份是银(也可能有铜),因此只叫把金件剪碎,投入硝酸中加热,银就和硝酸作用而生成易溶于水的硝酸银(Ag+2HNO_3=AgNO_3+H_2O+NO_2↑),而金仍为固体沉于容器底部。但是这样所提取之金,仍是不够纯净的,因为有些
Here to introduce to you a method of purification of gold and silver, I refer to the past gold and silver stores in the general method used and tested to improve the resulting, for secondary schools in the laboratory trial. Purification of gold: General gold in the impurities, a large part of silver (copper may also be), it is only called the pieces of metal cut into nitric acid heating, silver and nitric acid generated easily soluble in water Of silver nitrate (Ag + 2HNO 3 = AgNO 3 + H 2 O + NO 2 ↑), while gold remains solid at the bottom of the vessel. However, the gold thus extracted is still not pure enough because of some