Lesson: Chapter 12 — Electrochemistry

Preventing rusting 4 of 4 Reset answers

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Question 4

Why must the zinc blocks on a ship's hull be replaced from time to time?

A They become the cathode B They rust like iron C They corrode away in place of the iron D Sea water dissolves the paint on them

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They corrode away in place of the iron. The zinc is the anode — it is sacrificed so the iron hull is protected.

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