Basic chemistry
corrosion electrolytic cell
do the following questions
1. Write the reaction that occurs in the corrosion process
Answer : reaction that occurred
Anoda : 2Fe2+ → 2Fe3 + 2e- E⁰ = -0,77V X 2
Katode : O2 + 4H + 4e + 2H2O E⁰ = + 1,23V X 1
4Fe2+ (aq) + O2 (g) + 4H+ (aq) → 4Fe3+ (aq) + 2h2O(I) = Esel
Generally speaking, the process that leads to the creation of iron rust can be expressed as
follows:
2Fe(s) + 3/2O2(g) + XH2O(I) → Fe2O XH2O ( Iron rust )
Compound Fe2O3 XH2O is the chemical formula for rusty iron.
2. Why do things made of iron corrode easily? explain !
Answer : Because iron is oxidized while oxygen is reduced. Iron rust is generally in
the form of oxidation or carbonates. The chemical formula for iron is
Fe2O3. nH2O, a brown-red solid.
Corrosion is an electrochemical process. In ferrous corosene, a certain
portion of the iron acts as the anode, where the iron undergoes oxidation.
corrosion of iron can be prevented by making iron stainless (stainless steel),
however, this process is expensive, so it is not suitable for most users.
3. How do you protect metal from corrosion? name the example!
Answer : a). This is one example of iron painting
b). plastic coated, for example, household appliances.
c). plating with chrome, for example car bumpers.
d). coating with tin, for example packaging cans.
corrosion electrolytic cell
do the following questions
1. Write the reaction that occurs in the corrosion process
Answer : reaction that occurred
Anoda : 2Fe2+ → 2Fe3 + 2e- E⁰ = -0,77V X 2
Katode : O2 + 4H + 4e + 2H2O E⁰ = + 1,23V X 1
4Fe2+ (aq) + O2 (g) + 4H+ (aq) → 4Fe3+ (aq) + 2h2O(I) = Esel
Generally speaking, the process that leads to the creation of iron rust can be expressed as
follows:
2Fe(s) + 3/2O2(g) + XH2O(I) → Fe2O XH2O ( Iron rust )
Compound Fe2O3 XH2O is the chemical formula for rusty iron.
2. Why do things made of iron corrode easily? explain !
Answer : Because iron is oxidized while oxygen is reduced. Iron rust is generally in
the form of oxidation or carbonates. The chemical formula for iron is
Fe2O3. nH2O, a brown-red solid.
Corrosion is an electrochemical process. In ferrous corosene, a certain
portion of the iron acts as the anode, where the iron undergoes oxidation.
corrosion of iron can be prevented by making iron stainless (stainless steel),
however, this process is expensive, so it is not suitable for most users.
3. How do you protect metal from corrosion? name the example!
Answer : a). This is one example of iron painting
b). plastic coated, for example, household appliances.
c). plating with chrome, for example car bumpers.
d). coating with tin, for example packaging cans.
