Chapter 4: Chemical Reactions and Equations: Transforming Matter
The chapter explores the dynamics of chemical reactions, distinguishing between physical and chemical changes. It introduces chemical equations as a way to represent reactions, emphasizing the law of conservation of mass and the importance of balancing equations. Categorization of chemical reactions into synthesis, decomposition, single and double displacement, and combustion is discussed, alongside the concept of stoichiometry to quantify reactants and products in chemical processes.
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What we have learnt
- Chemical reactions involve changes in substances, leading to the formation of new materials.
- The law of conservation of mass states that mass is conserved in chemical reactions.
- Chemical equations provide a systematic way to represent the reactants and products in a reaction.
Key Concepts
- -- Chemical Reaction
- A process that leads to the transformation of one set of chemical substances to another, involving the breaking and forming of chemical bonds.
- -- Chemical Equation
- A symbolic representation of a chemical reaction, using chemical formulas and symbols to describe reactants and products.
- -- Stoichiometry
- The branch of chemistry that deals with the quantitative relationships between the amounts of reactants used and products formed in a chemical reaction.
- -- Mole
- A unit of measurement in chemistry that represents Avogadro's number (approximately 6.022 × 10^23) of particles.
- -- Combustion Reaction
- A type of reaction where a substance reacts rapidly with oxygen, typically producing heat and light.
Additional Learning Materials
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