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Checking Iron Protection After a Contact Opens 4 questions
Checking Iron Protection After a Contact Opens
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A corrosion simulation exposes equal areas of an iron strip to the same conducting liquid in each trial. A separate zinc piece contacts the liquid but never covers or touches the iron. A wire can provide an electron path between the pieces. Zinc atoms that become Zn2+ each release two electrons. Iron loss is tracked from the iron ions formed during the test.
| Trial | Connection between zinc and iron | Iron atoms converted to ions | Zinc atoms converted to ions |
|---|---|---|---|
| P | Open | 4 | 1 |
| Q | Closed | 1 | 5 |
Question 1
Which trial gives less iron oxidation?
- P only
- Q only
- The trials give equal iron oxidation.
- The zinc count prevents a comparison.
Question 2
Compare the electrons released by zinc oxidation in P and Q.
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Question 3
A student says zinc protects the iron by blocking liquid from reaching its surface. Evaluate the claim with the controlled exposure and the two records.
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An independent meter in Q records electrons moving from zinc through the connection to iron. A repeat opens the connection midway while keeping the exposed areas fixed.
Question 4
State what two changes the class should look for after the connection opens if the protection depends on that electron path.
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