Observe the following diagram and write answers.
(a) Name the method :-----------
(b) Write Anode reaction and Cathode reaction .
(c) Why fluorspar and cryolite are added in the mixture ?
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Answers
Answer:
it is the molten salt reacter this is the answer of bit a
Answer:
Concentration of ore is done by baeyer's process using chemical method.
The electrolytic reduction of alumina is done by hall heroult's process. The reaction at cathode is : 2Al
3+
+6e
−
→2Al Thus pure aluminium metal is formed at the cathode.
Cryolite is sodium aluminium fluoride (Na
3
AlF
6
). It ia an ore of aluminium. Cryolite and fluorspar acts as an solvent.
Al(OH)
3
→Al
2
O
3
+water
The oxygen evolved at the anode escapes as a gas or reacts with the carbon anode. The anode is thus oxidized to carbon monoxide which either burns giving CO
2
or escapes. Thus, anode has to be replaced as it is consumed periodically.
Explanation:
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