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

Question

Chemistry

Bessie

28 May, 09:58

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

+1

Answers (2)

Know the Answer?

Cloe Hooper · Answer 1

Emission of heat or light, or a color change.

Carleen · Answer 2

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.