Chemical reactions

Topics

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Sample objectives

What this unit covers

• Physical and chemical changes: Recognize and distinguish between physical changes and chemical changes.
• Rate of reaction: Explain how the rate of a reaction is influenced by factors such as the concentration of solutions, the surface area of solids, the temperature, and the presence of a catalyst.
• Rate of reaction: Recognize that a catalyst speeds up a reaction and remains unchanged after the reaction is complete.
• Redox: Explain that redox reactions consist of both oxidation and reduction occurring at the same time.
• Redox: Clarify that oxidation refers to the addition of oxygen, while reduction refers to the removal of oxygen.