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R-R-Reaction Time!. By: Chase “Cutie” Billet. Chemical Reactions. A chemical reaction happens when a chemical change takes place. Chemical reactions happen so atoms can get a full set of valence electrons and become more stable. Chemical Equations.

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r r reaction time

R-R-Reaction Time!

By: Chase “Cutie” Billet

chemical reactions
Chemical Reactions
  • A chemical reaction happens when a chemical change takes place.
  • Chemical reactions happen so atoms can get a full set of valence electrons and become more stable.
chemical equations
Chemical Equations

A chemical equation represents a chemical reaction where the reactants and products are expressed as formulas.

Reactant  Products

Reactants: The substances that undergo a change in a chemical reaction.

Products: The new substances that are a result of a Chemical Reactions.

chemical equations cont
Chemical Equations Cont.

Chemical equations are used to make reading, writing, and understanding chemical equations easier.

The arrow, , used in chemical equations stand for “yields” or “form”.

synthesis reaction
Synthesis Reaction
  • A reaction where two or more substances react to form a single substance.
  • Reactants may be either elements or compounds.
  • Product synthesized is always a compound.

Equation: A+B  AB

Analogy: Chocolate chips + Cookie dough Chocolate chip cookie dough

Example: Mg + O  MgO

decomposition reaction
Decomposition Reaction
  • Where a compound breaks down into two or more simpler substances
  • Reactant is always a compound.
  • Products may be elements or compounds.

Equation: AB  A + B

Analogy: Couple  Boy + Girl

Example: H2O  H2 + O

single displacement
Single Displacement
  • A reaction in which one element takes the place of another element in a compound.

Equation: A+BC B+AC

Analogy: Peanut butter + Jelly  Peanut butter + Marshmallow

Example: Cu + 2AgNO3 2Ag + Cu(NO3)2

double displacement
Double Displacement
  • A reaction in which two different compounds exchange positive ions and form new compounds.

Equation: AB+CD  AD+CB

Analogy: Swingers

Example: H2O + MgClMgO + H2Cl

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