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Understanding Chemical Reactions: Synthesis, Decomposition, and More

Learn about different types of chemical reactions like synthesis, decomposition, single-replacement, and double-replacement. Understand exothermic reactions that release heat and endothermic reactions that absorb energy.

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Understanding Chemical Reactions: Synthesis, Decomposition, and More

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  1. Types of Chemical Reactions

  2. Synthesis Reaction- when 2 or more substances combine to form a new substance. Ex: Na + Cl → NaCl Mg + O → MgO

  3. Decomposition Reaction- when 1 substance breaks down into 2 or more simpler substances. Ex: NaCl → Na + Cl MgO → Mg + O

  4. 3.Single-replacement Reaction-when 1 element replaces another in a compound. Na+1Cl-1 + K+1→ K+1Cl-1 + Na+1 Compound Element Compound Element

  5. 4. Double-Replacement Reaction- when the positive ions of the compounds switch with each other to make 2 new compounds. Na+1Cl-1 +Li+1F-1 →Li+1Cl-1 +Na+1F-1

  6. Exothermic Reaction- a reaction where some form of energy (in the form of heat) is given off by the reaction. -There is an increase in temperature.

  7. Endothermic Reaction- a reaction where energy must be provided for the reaction to take place. -There is an decrease in temperature.

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