How do you know when a chemical reaction has occurred?

Two students mix vinegar and baking soda. They observe bubbles forming, baking soda dissolving, and vinegar turning cloudy. They infer that a Chemical reaction has occurred. Which data support this inference?

In a chemical reaction, bonds between atoms are broken, and atoms rearrange and form new bonds.

5. When a substance undergoes a Chemical reaction, its physical properties also change?

Chemical Reaction: Ice Melts

Chemical Reaction: Iron reacts with oxygen to form rust

Chemical Reaction: Burning Wood

Chemical Reaction: Crushing a soda can

Chemical Reaction: Water boils

Chemical Reaction: Two clear liquids combine and become blue

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