(a)
What is a rust?
(b)
Write the chemical formula of rust.
(c)
Write the reaction of oxidation of iron at anode
(d)
Write the reaction of oxidation of iron at cathode,
(e)
What is corrosion ?
Answers
Answer:
A)Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. ... Rusting is the common term for corrosion of iron and its alloys, such as steel. Many other metals undergo similar corrosion, but the resulting oxides are not commonly called rust.
B)Rust is a general term for a series of iron oxides, usually, red oxides, formed by the reaction of iron with oxygen in the presence of water or air moisture. The chemical formula for rust is Fe2O3, which is called iron oxide but is also known as ferric oxide.
C)In the corrosion process, iron metal acts as the anode in a galvanic cell and is oxidized to Fe2+; oxygen is reduced to water at the cathode. The relevant reactions are as follows: at cathode: \[O_{2(g)} + 4H^+_{(aq)} + 4e^− \rightarrow 2H_2O_{(l)} \;\;\; E°=1.23\; V \label{Eq1}\].
D)In the corrosion process, iron metal acts as the anode in a galvanic cell and is oxidized to Fe2+; oxygen is reduced to water at the cathode. The relevant reactions are as follows: at cathode: \[O_{2(g)} + 4H^+_{(aq)} + 4e^− \rightarrow 2H_2O_{(l)} \;\;\; E°=1.23\; V \label{Eq1}\].
E)Corrosion is a natural process that converts a refined metal into a more chemically-stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials (usually a metal) by chemical and/or electrochemical reaction with their environment.
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