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Chemical Reactions

Chemical Reactions. By: turtlman001. Types of Chemical Reactions. There are 5 types of chemical reactions : Synthesis Decompostition Single Replacement Double Replacement

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Chemical Reactions

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  1. Chemical Reactions By: turtlman001

  2. Types of Chemical Reactions • There are 5 types of chemical reactions : Synthesis Decompostition Single Replacement Double Replacement Combustion

  3. Synthesis • In a synthesis reaction two or more substances combine to make one product • So a Reactant + Reactant = Product • An example of a synthesis reaction is Na + Cl = NaCl http://exploscience.com/ChemTV_Page2.html

  4. Decomposition • In a decomposition reaction one substance becomes two or more products • So a Reactant = Product + Product • An example of Decomposition is H2O = 2H + O http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm

  5. Single Replacement • In a single replacement reaction one element switches with another one in a compound. • You can think this at a dance when a couple is together and one person takes the place of one date and there is a new couple and one lonely person. • So AB + X = BX + A So Reactant + Reactant = Product + Product • An example of a Single replacement reaction is Mg + 2HCl which equals MgCl + H2

  6. Double Replacement • In a double replacement reaction two parts of a compound switch to form two new compounds • This is like when two couples go to a dance and one person out of each couple switch to get to new couples • So Reactant + Reactant = Product + Product http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm

  7. Combustion • In a combustion reaction between a fuel substance and oxygen and an activation energy • Oxygen is always involved in a combustion reaction • This is an exothermic reaction • This reaction usually creates heat and light • An example of combustion is when you have a wood fire the wood is the fuel and the activation energy is a match and the oxidant is oxygen

  8. Magnesium Burning Chemical Reaction Basics http://search.msn.com/images/results.aspx?q=magnesium+burning&FORM=MSNH#focal=91ee5af2add17a3469214946f7725e90&furl=http%3A%2F%2Fcatalog.miniscience.com%2Fcatalog%2Fmetals%2FImages%2FMagnesium_burning.jpg • The part of an atom affected by a chemical reaction is the electron • In a chemical reaction bonds are constantly being created and broke and chemicals may changed and energy is being absorbed or given off • Reactants are the chemicals that are creating the reaction and that’s why they are the reactants, Products are what the reactants have made when the reaction is over • The law of conservation of mass applies to chemical reactions by that matter can not be created nor destroyed although it may be rearranged, also the reactants must equal the products at the end of the reaction it might just be in different states • Some signs that a chemical reaction is happening is bubbles, heat, coldness, light, and change of color

  9. Exothermic and Endothermic Reactions • An exothermic reaction is when the energy being used is less then what the whole reaction, so this means that the extra energy is usually released as light, heat, and sometimes sound • An endothermic reaction is when the energy being used is greater then the reaction, so this means that the reaction absorbs energy in the form of getting colder • An example of an exothermic reaction is Na + Cl = NaCl in this reaction heat and light is created • An example of an endothermic reaction is when Barium hydroxide and Ammonium nitrate are added together they form Barium nitrate and ammonia gas and water A thermite reaction using iron (ll) oxide. An exothermic reaction http://en.wikipedia.org/wiki/Exothermic_reaction http://www.youtube.com/watch?v=GmiZ0huvZzs

  10. Energy and Chemical Reactions • In a chemical reaction the role that energy plays is when a chemical reaction is playing out energy is needed to create bonds and break bonds, also energy is given off in light, heat, coldness, bubbles • In a chemical reaction activation energy is the energy that must be overcome in order for a reaction to occur or the minimum energy to start a chemical reaction • In a chemical reaction chemical potential energy is arrangement of atoms or molecules, in these arrangements may result in bonds being created

  11. Bibliography Activation energy: http://en.wikipedia.org/wiki/potential_energy#chemical_potential_energy Chemical Reaction Basics: http://www.usoe.k12.ut.us/CURR/Science/scriberoo/8th/Matter/scriber/chemtype.htm Energy & Chemical reactions: http://www.infoplease.com/ce6/sci/a0802389.html Types of Chemical reactions: http://www.morymount.k12.ny.us/marynet/stwbwkos/j5flashchemtion/avreact/avreaction/html http://exploscience.com/ChemTV_Page2.html http://search.msn.com/images/results.aspx?q=magnesium+burning&FORM=MSNH#focal=91ee5af2add17a3469214946f7725e90&furl=http%3A%2F%2Fcatalog.miniscience.com%2Fcatalog%2Fmetals%2FImages%2FMagnesium_burning.jpg http://en.wikipedia.org/wiki/Exothermic_reaction http://www.youtube.com/watch?v=GmiZ0huvZzs

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