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Question
Why does a nail keep in preboiled water for two days not get rusted?
Why does a nail keep in preboiled water for two days not get rusted?
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Solution
Understanding the concept:
Rust is the oxidation of iron particles in the presence of air(oxygen) and water.
The explanation not to rust in preboiled water :
- Water and oxygen are required for rust at normal temperatures.
- Because boiling the water eliminates all dissolved gases, including oxygen.
- This water lacks oxygen so rust doesn't really occur.
- However, if the water is reintroduced to atmospheric oxygen, additional oxygen will dissolve as the water cools, and rust will form once more.
- Thus rust will not occur in pre-boiled water as it lacks oxygen, which is essential for rusting.
Understanding the concept:
Rust is the oxidation of iron particles in the presence of air(oxygen) and water.
The explanation not to rust in preboiled water :
- Water and oxygen are required for rust at normal temperatures.
- Because boiling the water eliminates all dissolved gases, including oxygen.
- This water lacks oxygen so rust doesn't really occur.
- However, if the water is reintroduced to atmospheric oxygen, additional oxygen will dissolve as the water cools, and rust will form once more.
- Thus rust will not occur in pre-boiled water as it lacks oxygen, which is essential for rusting.
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