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the toxic gas in the baking soda makes bubbles with the vinegar mixed in it makes a chemical reaction and then makes a new product.

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Wiki User

11y ago
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5mo ago

Baking soda acts as a mild abrasive that can help remove dirt and oxidization from the surface of the penny. When combined with water to form a paste, the baking soda can gently scrub away the grime without damaging the coin's surface.

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Q: How does baking soda clean pennies?
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