Introduction to Chemical Reactions

Chemical reactions are processes where one or more substances are converted into new substances. There are several types of chemical reactions, including:

• Combination Reactions: Two or more substances combine to form a new substance. Example: 2Na + Cl2 → 2NaCl
• Decomposition Reactions: A single substance breaks down into two or more simpler substances. Example: 2H2O → 2H2 + O2
• Displacement Reactions: One substance displaces another substance from a compound. Example: Zn + CuSO4 → ZnSO4 + Cu
• Double Displacement Reactions: Two substances exchange partners to form new compounds. Example: Na2SO4 + BaCl2 → BaSO4 + 2NaCl