4 Write down half-equations for the processes occurring during electrolysis at: a the anode: b the cathode: . 5 Complete the two statements. a Oxidation . b Reduction (. of electrons) occurs at the. of electrons) occurs at the *....... * *.. ..........
Science behind corrosion-test
Corrosion is defined as an activity that transforms refined metals into more chemically stable forms such as oxide, hydroxide, carbonate, or sulfide. It refers to the slow decomposition of things (typically metals); thanks to chemical and/or electrochemical reactions with their surroundings. Corrosion engineering is the science of preventing and controlling corrosion.
Corrosion
Corrosion is defined as an activity that transforms refined metals into more chemically stable forms such as oxide, hydroxide, carbonate, or sulfide. It refers to the slow decomposition of things (typically metals); thanks to chemical and/or electrochemical reactions with their surroundings. Corrosion engineering is the science of preventing and controlling corrosion.
number 4 and 5 only
![The extraction of aluminium
The diagram shows the electrolysis of alumina (aluminium oxide) purified from bauxite.
graphite
anodes
graphite Inng
(amode)
de spply
solid crust
krming on
minture
aluminium
oide
dssoved
nayolte
moten
aluninium
3 a What is the formula for aluminium oxide?
b What ions are present in aluminium oxide? .
c What is the purpose of the cryolite in the process?
4 Write down half-equations for the processes occurring during electrolysis at:
a the anode: .
b the cathode:
5 Complete the two statements.
a Oxidation .
b Reduction (.
of electrons) occurs at the.
of electrons) occurs at the.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8a556695-7fa0-4ba4-b955-cab2a7f2922f%2F8b294714-a39a-49e4-8e79-9eba42d48906%2Fgtpxm2i_processed.png&w=3840&q=75)
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