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is a process that uses electricity to separate the elements in a compound. is expensive and so it is only used to reactive that cannot be in other ways. Aluminium is a reactive that is found in the ore bauxite combined with oxygen as aluminium oxide Al 2 O 3 .read more
The position of the on the reactivity series determines the method of . Higher placed above carbon have to be using as they are too reactive and cannot be reduced by carbon. Lower placed can be by heating with carbon which reduces. The process is very expensive as large amounts of energy are required to melt …read more
Find my revision workbooks here: https://www.freesciencelessons.co.uk/workbooksIn this video, we continue looking at by exploring how we ...read more
The Hall–Héroult process is the major industrial process for smelting aluminium.It involves dissolving aluminium oxide alumina obtained most often from bauxite, aluminiums chief ore, through the Bayer process in molten cryolite, and electrolysing the molten salt bath, typically in a purpose-built cell. The Hall–Héroult process applied at industrial scale happens at 940–980 °C …read more
The reactivity of a metal determines how it is extracted. Metals above carbon in the reactivity series must be extracted using electrolysis. Metals less reactive than carbon can be extracted from their ores by reduction. Copper, silver, gold and platinum can occur in their pure form natively and do not need to be extracted.read more
can be separated by electrolysis. This method is. used for the extractionofsome metalsfrom their ore. See for example leadbromide, magnesiumchloride, potassiumchloride, sodiumchlorideand zincchloride. The situation is more complicatedwhen the substance. used for electrolysisis dissolvedin water.read more
In theory, any could be from its compounds using However, large amounts of electrical energy are needed to do this, so is expensive. If a is less...read more
such as K, Na, Ca, Mg and Al, that are reactive or at the top of the electrochemical series, are from the of fused compounds. In case of their aqueous solutions, cannot be as the water in the solution gets discharged at the cathode and only of fused compounds is possible.read more
· After obtaining the oxide the is by either reduction or : The reduction method. The oxide is mixed with coke and limestone and heated in a furnace. Diagram: Furnace for zinc by reduction: The limestone CaCO 3 decomposes to liberate CO 2 which is then reduced by coke to form carbon II oxide. Equations:read more
· All above iron in the reactivity series that is, potassium, sodium,calcim, magnesium and aluminium are . This is because they form too stable compounds that are difficult to reduce using simple reducing agents like carbon monoxide.read more
Q. The which can be from its ore by the method of is /are - Published on 04 Sep 15read more
· - involves breaking down ionic compounds into simplerread more
Electrolysis is the most powerful extraction method. But it takes a lot of electricity and that makes it expensive. Hence, electrolysis is only used for the most reactive metals. Examples of the different methods of extractionread more
This video covers:- How to reactive from their oxides using - Recap of unreactive with reduction by carbon- Th...read more
Several purification steps are applied to remove impurities from process solutions prior to . Similar to Zn2+, Ni2+ is removed by a sulfide precipitation method using cobalt ...read more
This video looks at how are by using carbon. We look at the reactivity series and how this method is more cost-effective than .read more
In principle, any metal could be extracted from its compounds using electrolysis. However, large amounts of electrical energy are needed to do this, so electrolysis is expensive. If a metal is less...read more
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