What is a reactivity series? How does this series of metals help in predicting the relative activities of various metals
Answers
Answer:
reactivity series the series in which the atom can be classified with the help of valency and chemical properties ....
Explanation: by this metals valency can be known and by valency its chemical properties and nature can be found out ....
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Answer:
1 ) .Reactivity series :
It is series of decreasing order of metals' reactivity. Hydrogen is place in middle of series. Above hydrogen metals are more reactive in nature below are less. Metal which is more reactive it displaces a less reactive metal from its salt solution.
2 ) . Some chemical method for extraction :
a ) . In order to obtaining a metal from its oxides for metals in the high of the reactivity series their oxides are reduced to metals by the process of electrolysis
For instance :
Electrolysis of sodium chloride :
Na⁺ + e⁻ ⇒ Na [ At cathode ]
2 Cl⁻ ⇒ Cl₂ + 2 e⁻ [ At anode ]
b ) . In order to obtaining a metal from its oxides for metals in the middle of the reactivity series then metals towards oxides of such metals can be reduced with coke (carbon) which acts as a reducing agent.
For instance :
2 Fe₂O₃ + 3 C ⇒ 4 Fe + 3 CO₂.
c ). In order to obtaining a metal from its oxides for metals in the least reactive roasting should be done.