Casimir recently purchased an old car. He notices the rims have some spots of rust on them. So, he goes to an automotive shop and chooses a product that is recommended for removing rust. Which acid is most likely to be found in the product?

Hydrochloric acid can dissolve rust, so it is the most likely choice for a rust-removal product. The other acids are better known for different uses: sulfuric acid is used in car batteries, nitric acid in fertilizers, and hydrofluoric acid can etch glass.

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