write in details about the extraction of aluminium or iron or copper. with the chemical and physical properties
Answers
Explanation:
Aluminum is a metal of Group 13 and copper, iron and zinc are transition metals. In general, metals are extracted from their ore, which is a naturally occurring substance. Aluminum is extracted electrolytically, which involves passing electricity through an ionic substance in a solvent with the presence of two rods called electrodes. During the process, the metal gets deposited in one of the electrodes. Copper is extracted by the self-reduction method. Iron and zinc are both extracted by carbon reduction method from their respective ores.
extraction of aluminum :
Aluminum is extracted electrolytically from bauxite, which is aluminum ore. Bauxite contains hydrated alumina (Al2 O3) with some proportions of iron oxide. The extraction process involves the following steps.
Aluminum is extracted electrolytically from bauxite, which is aluminum ore. Bauxite contains hydrated alumina (Al2 O3) with some proportions of iron oxide. The extraction process involves the following steps.A. Purification of bauxite - This is a two-step process called Bayer's process:
Aluminum is extracted electrolytically from bauxite, which is aluminum ore. Bauxite contains hydrated alumina (Al2 O3) with some proportions of iron oxide. The extraction process involves the following steps.A. Purification of bauxite - This is a two-step process called Bayer's process:First, we dissolve bauxite in aqueous sodium hydroxide (NaOH) by digestion. Bauxite with higher hydroxide contents (Al(OH)3) are treated at 120-140° C with dilute (3M) NaOH and bauxite with higher oxide content (AlOOH) is treated at a higher temperature (200-250° C) and a higher pressure (35 atm) with 5-7M NaOH.
Aluminum is extracted electrolytically from bauxite, which is aluminum ore. Bauxite contains hydrated alumina (Al2 O3) with some proportions of iron oxide. The extraction process involves the following steps.A. Purification of bauxite - This is a two-step process called Bayer's process:First, we dissolve bauxite in aqueous sodium hydroxide (NaOH) by digestion. Bauxite with higher hydroxide contents (Al(OH)3) are treated at 120-140° C with dilute (3M) NaOH and bauxite with higher oxide content (AlOOH) is treated at a higher temperature (200-250° C) and a higher pressure (35 atm) with 5-7M NaOH.Next, the insoluble impurities are separated by filtration. Al(OH)3 is precipitated by carbon dioxide and ignited to ~1200° C to obtain Al2 O3.
Aluminum is extracted electrolytically from bauxite, which is aluminum ore. Bauxite contains hydrated alumina (Al2 O3) with some proportions of iron oxide. The extraction process involves the following steps.A. Purification of bauxite - This is a two-step process called Bayer's process:First, we dissolve bauxite in aqueous sodium hydroxide (NaOH) by digestion. Bauxite with higher hydroxide contents (Al(OH)3) are treated at 120-140° C with dilute (3M) NaOH and bauxite with higher oxide content (AlOOH) is treated at a higher temperature (200-250° C) and a higher pressure (35 atm) with 5-7M NaOH.Next, the insoluble impurities are separated by filtration. Al(OH)3 is precipitated by carbon dioxide and ignited to ~1200° C to obtain Al2 O3.B. Purified bauxite is then dissolved in cryolite, which is 5-7% CaF2 , 5-7% AlF3, 2-8% Al2 O3 and electrolyzed at 950° C in a carbon-lined steel cathode with hard carbon rods as the anode. Li2 CO3 is used to (i) lower the melting point of the electrolyte, (ii) permit a larger current flow, and (iii) reduce fluorine emission