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Chemical Reactions

Chemical Reactions

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Chemical Reactions

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  1. Chemical Reactions By: Baseballer223

  2. 1.The Basics of Chemical Reactions The outermost Electrons are only affected in Chemical Reactions. • Example-The Valence Electrons are affected during Chemical Reactions • A Chemical Reaction is a change in which a substance is changed into one or more new substances.Also,bonds are being broken and created • Example-When you mix Hydrogen and Chloride in an Ammonia test tube, you get Ammonium Chloride • H2+O2=H2O

  3. 1.The Basics of Chemical Reactions • A reactant is a substance or compound consumed during a Chemical Reaction • Example-When Hydrogen burns in Oxygen forming Water the reactants are Hydrogen and Oxygen • Five signs of a Chemical Reaction are:1.Change of Color 2.Formation of Gas 3.Formation of precipitate 4.Change of temperature 5.Energy produced •

  4. 1.The Basics of Chemical Reactions • Chemical Reactions relates to the law of Conservation and Mass because the law of conservation of mass states in both you have the same amount of products before the reaction and after the reaction • Example-When water is coming out of a faucet, it is fat on top and slim on the bottom • Example-If a solid turns into a liquid,the mass stays the same.

  5. 2.Energy and Chemical Reactions Chemical potential energy is energy possesed by an object because of its position • Example-A massive ball of a demolition Machine or a stretched bow. • Activation energy is energy that must be overcome so that a Chemical Reaction can take place • Example-Sparks are made by striking steel against a flint.

  6. 2.Energy and Chemical Reactions • You start a Chemical Reaction by mixing two chemicals that don’t mix well together. • Exothermic reaction describes a process that releases energy usually in the form of heat, light,electricity,or sound • Example-Condensation of rain from Water Vapor

  7. 2.Energy and Chemical Reactions • Endothermic Reactions is a process that absorbs energy in the form of heat. • Example-Mixing water with potassium chloride •

  8. 3.Types of Chemical Reactions • Synthesis is a process which combines together two or more pre-existing elements resulting in the formation of a new one.

  9. 3.Types of Chemical Reactions • Decomposition is the separation of a chemical compound into an element. • Example-An example of decomposition is that of Hydrogen Peroxide which will slowly decompose into water and oxygen

  10. 3.Types of Chemical Reactions • Combustion is a complex sequence of exothermic chemical reactions between a fuel and an oxidant. • Example-In the combustion of Hydrogen and Oxygen, the result is Water Vapor • A single displacement reaction is when an element moves out of one compound and into another. • Example-The reaction between Magnesium and Hydrochloric acid forms Magnesium Chloride.

  11. 3.Types of Chemical Reactions A double displacement reaction is an exchange of bonds between two reacting chemical species.

  12. 3.Types of Chemical Reactions • An example of a double displacement reaction • An example of Combustion

  13. 3.Types of Chemical Reactions • An example of decomposition • An example of Chemical synthesis (Iron rusting) 4 Fe + 3 O2 → 2 Fe2O3 (iron rusting)

  14. The End!!!