What is the purpose of using boiled water and oil in the orange test tube?
Rusting Nails

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Science, Physics, Chemistry
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6th - 12th Grade
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To increase the rate of corrosion
To prevent oxygen from dissolving in the water
To enhance the conductivity of the water
To provide a source of calcium ions
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which test tube showed signs of corrosion at the water line and around the head of the nail?
Yellow test tube
Blue test tube
Green test tube
Orange test tube
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of hydroxide ions in the rusting process?
They increase the conductivity of water
They act as a drying agent
They prevent the formation of rust
They combine with iron ions to form iron hydroxide
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the final product formed in the rusting process?
Iron 2 oxide
Iron 3 hydroxide
Iron chloride
Iron 3 oxide
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is salt water more conducive to rusting than regular water?
It is less dense
It has a higher temperature
It contains more oxygen
It contains sodium and chloride ions that increase conductivity
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is sacrificial protection?
A way to paint ships to prevent rust
A method to increase the rate of rusting
A process where a more reactive metal corrodes instead of steel
A technique to remove rust from metal surfaces
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why do small pieces of metal need to be regularly replaced in sacrificial protection?
They dissolve in water
They corrode over time, protecting the steel
They lose their reactivity
They become too heavy
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