Question

EXPERIMENT 1: Observations of Chemical Changes

Answer 1

Solution :-

Chemical change means the making and breaking of bonds means some molecules reacts to form new molecules of the differnt physical and chemical properties.

The observations that are used to identify the chemical chages are as follows

The change in the color of the reacting material is considered as observation of the chemical change.

Formation of the precipitate (solid) in the reaction mixture is the chemical change

Evolution of the gas from the reaction mixture is observation of the chemical change. means fiormation of bubbles.

Change in the temperature of the reaction mixture can be considered as chemical change.