what is reactivity series? Suggest different chemical processes used for obtaining a metal from its oxides for metals in the middle of the reactivity series and metals towards the top of the reactivity series. Give an example to support your answer?
Answers
The reactivity series is where metals are arranged in the decreasing order of their reaction with other metals. If a metals is more reactive metal only then can it replace a metal which is less reactive
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 ) .
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.
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 ]