Following this 2 boiling chips were added and the mixture was heated over a meeker burner. The solution was stirred until almost boiling, at this point it was removed from the heat. Black precipitate was allowed to settle and the water was decanted into the sink and 100 mL of hot distilled water was added, and the mixture was stirred...
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After settling the supernatant liquid was decanted into the sink. In the hood 1 mL of 6.0 M sulfuric acid (H2SO4) was added and the mixture was stirred until the CuO was dissolved. An additional 1.0 mL of sulfuric acid (H2SO4) was added. 50-75 mL of distilled water was added with 2 drops of 0.1 M Sodium Fluoride (NaF) to break up the surface oxide layer...
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copper It is very ductile, or easily drawn out into wires. This is yet another reason why it is so useful	1 / 265
chalcopyrite Roasting The copper which is about 15% is now roasted in air which oxidizes the FeS to FeO and leaves the CuS. The chemistry that occurs within this process is 2CuFeS2(s) + 3O2(g) 2CuS(s) + 2FeO(s) + 2SO2(g) 3...	2 / 496
Minerals By: Nick Hirschmann October 25, 1996 Minerals are natural compounds or elements of inorganic nature. There are 92 naturally occurring elements that have specific physical properties, definite chemical composition, and characteristic atomic structure...	1 / 184
Copper Lamps are also attached to these helmets in case some of the lighting in the mine goes out leaving a miner stranded in the dark. One of the biggest problems with mining is that in some places dangerous gas's may exist, like Carbon Monoxide...	3 / 679