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Is that blackish red stuff that forms on old kectup bottles a physical change?

Updated: 5/29/2024

Wiki User

∙ 12y ago

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yes

Ashlee Farrell ∙

Lvl 13

∙ 2y ago

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∙ 2d ago

Yes, the blackish red stuff on old ketchup bottles is a chemical change known as oxidation. It occurs when the compounds in the ketchup react with oxygen in the air over time, causing the color change.

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