Question

Practice 3-Signs of Chemical Reactions: Match the description of a chemical reaction to the proper sign

that a chemical reaction has occurred.
A. Color changed
B. Gas released
C. Energy released
D. Odor Change
1. Two liquids are formed and solid forms:
2. The clear part of an egg turns white while cooking:
3.
A glass of soda produces bubbles and makes a hissing sound:
4.
Explosion of Dynamite:
5. Souring milk:
E. Precipitate formed

Answer 1

Chemical reactions can be identified by different signs such as color change, gas release, and precipitate formation.

Step-by-step explanation:

1. The formation of two liquids and a solid would indicate the formation of a precipitate.

2. When an egg is cooked, the clear part turns white due to a protein denaturation reaction, indicating a color change.

3. The production of bubbles and a hissing sound when opening a glass of soda indicates the release of gas.

Learn more about Signs of chemical reactions