List two observations that could be evidence of a chemical reaction.

Question

Chemistry

Brisa Hubbard

15 November, 23:47

List two observations that could be evidence of a chemical reaction.

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Answers (2)

Know the Answer?

Andres Proctor · Answer 1

1) Smell or odour

2) Colour change

Explanation:

1) Smell or odour

Example: Add HCl to a FeS solution. There will be a strong odor of H2S

2) Colour change

Example : NaOH and KMnO4 solution to a river water sample. There will be a colour change to brown.

Tess Lambert · Answer 2

Emission of heat or light, or a color change.