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Question
| Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction. |
Name a chemical used for dissolving aluminium oxide. In which state is the chemical used?
Solution
Fluorspar and cryolite are used for dissolving \[\ce{Al2O3}\]. This chemical is used in the molten state.
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RELATED QUESTIONS
For the substance given below, describe the role played in the extraction of aluminium.
Sodium hydroxide
Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.
Write an equation for the reaction which takes place at the anode during the extraction of aluminium by the electrolytic process.
Name the following:
The substance added along with aluminium in the Hall-Heroult's process.
In the Hall's process for extraction of aluminium, Give the formula and purpose of fluorspar and cryolite
Why is food containing iron salts should not be cooked in aluminium utensils?
The following is an extract from 'Metals in the Service of Man, Alexander and Street/Pelican 1976':
| 'Alumina (aluminium oxide) has a very high melting point of over 2000°C so that it cannot readily be liquefied. However, conversion of alumina to aluminium and oxygen, by electrolysis, can occur when it is dissolved in some other substance.' |
- Which solution is used to react with bauxite as a first step in obtaining pure aluminium oxide?
- The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the balanced chemical equation for this reaction.
- Name the element which serves both as the anode and the cathode in the extraction of aluminium.
- Write the balanced chemical equation for the reaction that occurs at the cathode during the extraction of aluminium by electrolysis.
- Give the balanced chemical equation for the reaction which occurs at the anode when aluminium is purified by electrolysis.
Explain with reason:
A neutral gas other than oxygen is formed at the anode during the electrolysis of fused alumina.
Answer the following question:
Write the chemical formula of one main ore of iron and aluminium.
The chief ore of Aluminium is ______
Name the compound formed when: Bauxite reacts with sodium hydroxide.
