Chalcocite is an important copper mineral ore. It has been mined for centuries and is one of the most profitable copper ores. The reasons for this is its high copper content (67% atomic ratio and nearly 80% by weight) and the ease at which copper can be separated from sulfur. It is not however the primary ore of copper due to its scarcity.
Divide the mass of copper sulfate by the mass of copper sulfate pentahydrate Mass of just Copper Sulfate in sample % x ( g CuSO4 x 5H2O) = g CuSO4 Multiply the mass of Copper Sulfate Pentahydrate by the percent composition of CuSO4 Mass of Copper in Solution g FP Cu g FP = .96 g Cu
Law of Definite Proportions and Types of Chemical Reactions Objectives Today's experiment will use the Law of Conservation of mass and the Law of Definite Proportions to determine the percent composition of each element in the newly synthesized compound. (More specifically, determine the % Cu and % S by weight in the .
About 80% of all copper extracted comes from sulphide ores. A typical ore contains only % to % copper. It is a measure of the value of copper that it is worth extracting it from such small concentrations. The ore is a mixture of minerals and rock (called gangue). The most common copper minerals are: