A science student investigated the conditions for the rusting of iron nails - Junior Cycle Science - Question h - 2006
Question h
A science student investigated the conditions for the rusting of iron nails. A diagram of the apparatus used is given below.
(i) Why did the iron nail rust only in ... show full transcript
Worked Solution & Example Answer:A science student investigated the conditions for the rusting of iron nails - Junior Cycle Science - Question h - 2006
Step 1
Why did the iron nail rust only in test tube A?
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Answer
The iron nail rusted in test tube A because both air (oxygen) and water (moisture) were present. Rusting (oxidation) requires the presence of both of these elements to occur.
Step 2
Why did the iron nail not rust in test tube B?
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The iron nail did not rust in test tube B because there was no air (oxygen) present. Without oxygen, the oxidation reaction needed for rusting cannot take place.
Step 3
Why did the iron nail not rust in test tube C?
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The iron nail did not rust in test tube C because there was no water present. Water is essential for the rusting process; without it, rusting cannot occur.
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