GED Science
Comprehensive study of GED science covering fundamental concepts and advanced applications.
Advanced Topics
Chemistry: Chemical Reactions
How Substances Change
Chemistry explores how substances interact and change. A chemical reaction happens when substances combine or break apart to form new substances.
Signs of a Chemical Reaction
- Color change
- Gas production (bubbles)
- Temperature change
- Formation of a solid (precipitate)
Balancing Chemical Equations
In a chemical reaction, atoms are rearranged but not created or destroyed. The number of atoms on each side of the equation must be equal.
Everyday Chemistry
Chemical reactions are everywhere: cooking, cleaning, and even in our bodies!
Formula
"H_2 + O_2 \rightarrow H_2O"
Key Formula
\[H_2 + O_2 \rightarrow H_2O\]
Examples
Vinegar and baking soda mix to make bubbles of carbon dioxide gas.
Iron rusts when it reacts with oxygen and water.
In a Nutshell
Chemical reactions create new substances by rearranging atoms.