How can you tell that a chemical change has occurred?
Understand the Problem
The question is asking for indicators that signify a chemical change, comparing different statements to identify which one correctly describes a chemical transformation.
Answer
Color change, gas production, precipitate formation, temperature change, odor change, light emission.
Changes indicating a chemical reaction include color change, gas production, formation of a precipitate, temperature change, odor change, and emission of light.
Answer for screen readers
Changes indicating a chemical reaction include color change, gas production, formation of a precipitate, temperature change, odor change, and emission of light.
More Information
These signs indicate that new substances are being formed and the original substances are changing fundamentally.
Sources
- Introduction to Chemistry - Evidence of a Chemical Reaction - chem.libretexts.org
- What are some signs of chemical change? - SERC (Carleton) - serc.carleton.edu
- Evidence of Chemical Change - Let's Talk Science - letstalkscience.ca
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