Plan and design an experiment to ascertain whether this element should be placed above or below magnesium in Group 2. If Taffeta reacts with cold water to form Taffies hydroxide and hydrogen then Taffies is above Magnesium in Group 2. To determine whether Taffies is more reactive than Magnesium in Group 2. Taffies, Magnesium powder, two ml beakers, cold water, spatula, splint, match, Procedure:
Mining can be subdivided into 4 basic types: Placer Hard rock Open pit After mining, metal ores are obtained. These ores are usually not pure and hence have to undergo a series of complex purification methods before being processed to form alloys.
Extraction of Metals The separation of metals in a pure or relatively pure state from the minerals in which they occur naturally. Metals are found in the Earth either as compounds or, in the case of very unreactive metals, as the crust of the uncombined element.
The rock that contains the metal is called an ore.
Common metal ores include bauxite aluminium oxidehaematite iron oxidezinc blende zinc sulphidegalena lead sulphideand cinnabar mercury sulphide. A metal ore is a mineral or mixture of minerals from which economically viable amounts of metal can be extracted, i. Ores are often oxides, carbonates or sulphides.
They are all finite resources so we should use them wisely! In order to extract a metal, the ore or compound of the metal must undergo a process called reduction to free the metal i.
The chemical that removes the oxygen from an oxide is called the reducing agent i. Generally speaking the method of extraction depends on the metals position in the reactivity series The reactivity series of metals can be presented to include two non-metals, carbon and hydrogen, to help predict which method could be used to extract the metal.
They are usually extracted by electrolysis of the purified molten ore or other suitable compound e. The ore or compound must be molten or dissolved in a solution in an electrolysis cell to allow free movement of ions electrical current.
Theory given in the appropriate sections. Metals below carbon can be extracted by heating the oxide with carbon or carbon monoxide. Metals below hydrogen will not displace hydrogen from acids.
Their oxides are easily reduced to the metal by heating in a stream of hydrogen, though this is an extraction method rarely used in industry. In fact most metal oxides below carbon can be reduced when heated in hydrogen, even if the metal reacts with acid. For example gold and sometimes copper and silver and no chemical separation or extraction is needed.
Other methods are used in special cases using the displacement rule. A more reactive metal can be used to displace and extract a less reactive metal but these are costly processes since the more reactive metal also has to be produced in the first place!
See Titanium or see at the end of the section on copper extraction. Sometimes electrolysis is used to purify less reactive metals which have previously been extracted using carbon or hydrogen e. Electrolysis is also used to plate one metal with another.
The demand for raw materials does have social, economic and environmental implications e. Historically as technology and science have developed the methods of extraction have improved to the point were all metals can be produced. The reactivity is a measure of the ease of compound formation and stability i.overview of the periodic table) "Describe an ancient metal extraction process and recount the separation and or decomposition such as aluminium, and the metals that are added to iron to make steel.
"Explain why energy input is required to extract a metal from its ore". extraction was studied and the results showed that 4 g/l Fe2+ is the best concentration for zinc extraction and other concentrations above and below this concentration have the adverse effect on bioleaching efficiency of the bacterium.
Chemical Reactions of Copper and Percent Yield KEY Pre-lab (Review Questions) 1. Give an example, other than the ones listed in this experiment, of redox and metathesis reactions. May 20, · Until this process, was developed, aluminium was a precious metal, wherefore the Washington Monument was capped therewith and Napoleon had a cutlery set and plates made of aluminium instead of silver.
the extraction of precious metals from refractory ores.5 Biosorption soon will be applied in the removal of toxic elements from industrial effiuents.
6 The interest in bioleaching processes is a consequence of the economic advantages associated with. This experiment involves producing copper from copper ore (malachite). The composition of malachite is mainly copper(II) carbonate benjaminpohle.com(OH)2. This experiment involves .