Indicators that a chemical reaction is occurring -
- the formation of bubbles
- a change in color
- the formation of a precipitate
Chemical reactions involve the chemical interaction of two or more chemical substances, resulting in a new substance being formed, and are usually irreversible.
The signs of chemical reactions include gas formation, energy release in the form of light or flame, heat absorption, precipitate formation, and color change.
- Gas bubbles appear after a chemical reaction has occurred and the mixture becomes saturated with gas.
- A solid, known as a precipitate, that forms after two solutions are mixed is also a sign of a chemical change.
- Each chemical compound has a characteristic color. When the compound changes during a chemical reaction, the color may change as well.
Thus, Indicators that a chemical reaction is occurring -
- the formation of bubbles
- a change in color
- the formation of a precipitate
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