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Sacrificial protection is a method used to prevent iron from rusting - OCR Gateway - GCSE Chemistry - Question 15 - 2021 - Paper 1
Question 15
Sacrificial protection is a method used to prevent iron from rusting. Sacrificial protection involves plating the iron with a more reactive metal such as zinc. Which... show full transcript
Worked Solution & Example Answer:Sacrificial protection is a method used to prevent iron from rusting - OCR Gateway - GCSE Chemistry - Question 15 - 2021 - Paper 1
Step 1
Which statement explains how sacrificial protection works?
Answer
The correct answer is D: The more reactive metal loses electrons more easily than the iron. This is because in sacrificial protection, a more reactive metal (like zinc) is used to protect the less reactive metal (like iron) from corrosion. The more reactive metal acts as an anode in electrochemical corrosion, allowing it to oxidize and lose electrons preferentially compared to the iron, thus preventing the rusting of iron.