extraction of high reactive metal explain
Answers
Answer:
Metals of high reactivity; such as sodium, calcium, magnesium, aluminium, etc. are extracted from their ores by electrolytic reduction. These metals cannot be reduced using carbon because carbon is less reactive than them.
Electrolytic Reduction: Electric current is passed through the molten state of metal ores. Metal; being positively charged; is deposited over the cathode.
Example: When electric current is passed through molten state or solution of sodium chloride, sodium metal deposited over cathode.
Na+ + e− ⇨ Na
2Cl− − e− ⇨ Cl2
2NaCl ⇨ 2Na + Cl2
Answer:
Extraction of Metals of high reactivity. Metals of high reactivity; such as sodium, calcium, magnesium, aluminium, etc. are extracted from their ores by electrolytic reduction. These metals cannot be reduced using carbon because carbon is less reactive than them.
Aluminium is a high reactive metal and so it cannot be extracted just by using heat or a reducing agent such as carbon or hydrogen as is done in copper or iron extraction. More energy is needed to remove the oxygen from the aluminium, and this is done using electrical energy in a process called ELECTROLYSIS.