IB Grade 9 Chemistry | Chapter 4: Chemical Reactions and Equations: Transforming Matter by Prakhar Chauhan | Learn Smarter
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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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Sections

  • 4

    Chemical Reactions And Equations

    This section discusses the distinction between physical and chemical changes, the signs of chemical reactions, and how to represent these transformations with equations.

    Learning Practice

  • 4.1

    Transforming Matter

    This section introduces the distinction between physical and chemical changes, exploring the transformative processes of matter and the indicators of chemical reactions.

    Learning Practice

  • 4.2

    Distinguishing Between Physical And Chemical Change

    This section describes the key differences between physical and chemical changes in matter, illustrating how these processes are fundamental to understanding chemical reactions.

    Learning Practice

  • 4.3

    Unveiling Chemical Reactions: Evidence Of Change

    This section explores the observable evidence of chemical reactions, emphasizing the indicators that signal a chemical change has occurred.

    Learning Practice

  • 4.4

    Representing Transformations: Chemical Equations

    This section discusses the representation of chemical reactions using chemical equations, emphasizing their significance and the process of balancing them.

    Learning Practice

  • 4.5

    Classifying Chemical Reactions: A System For Understanding

    This section focuses on classifying chemical reactions into distinct types to aid in understanding their processes and predicting products.

    Learning Practice

  • 4.5.1

    Synthesis (Combination) Reactions

    Synthesis reactions involve the combination of two or more substances to form a more complex product.

    Learning Practice

  • 4.5.2

    Decomposition Reactions

    Decomposition reactions involve a complex compound breaking down into simpler substances, often requiring energy input.

    Learning Practice

  • 4.5.3

    Single Displacement (Replacement) Reactions

    Single displacement reactions involve one element replacing another in a compound, often driven by the reactivity of the elements involved.

    Learning Practice

  • 4.5.4

    Double Displacement (Replacement) Reactions

    Double displacement reactions involve the exchange of ions between two compounds to form new products, often resulting in the formation of a precipitate, gas, or water.

    Learning Practice

  • 4.5.5

    Combustion Reactions

    Combustion reactions involve the rapid reaction of a substance with oxygen, producing heat and light, typically resulting in carbon dioxide and water when hydrocarbons are burned.

    Learning Practice

  • 4.6

    The Power Of Moles: Stoichiometry In Action

    This section introduces the concept of stoichiometry and the mole, which is essential for quantifying the relationships between reactants and products in chemical reactions.

    Learning Practice

References

Untitled document (11).pdf

Class Notes

Memorization

What we have learnt

  • Chemical reactions involve ...
  • The law of conservation of ...
  • Chemical equations provide ...

Final Test

Revision Tests