A student is studying chemical changes and mixes two liquid compounds. Which statement best describes what the student should observe if a chemical reaction is occurring?
A. The two substances dissolve.
B. A solid substance appears.
C. The mass of the substances increases.
D. The temperature of the substances stays the same.

Question

A student is studying chemical changes and mixes two liquid compounds. Which statement best describes what the student should observe if a chemical reaction is occurring? 
A. The two substances dissolve. 
B. A solid substance appears. 
C. The mass of the substances increases. 
D. The temperature of the substances stays the same.

GinnyAnswer · Answer

The best observation indicating a chemical reaction when mixing two liquid compounds is the formation of a solid substance, known as precipitation. Other indicators include changes in color and temperature. Therefore, the appearance of a solid is most indicative of a chemical change. ;

Answered by GinnyAnswer | 2025-07-07

Answer (1)

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