Equations. Chemical Reaction When a substance goes through a reaction and changes into another...

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Equations

Transcript of Equations. Chemical Reaction When a substance goes through a reaction and changes into another...

Page 1: Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

Equations

Page 2: Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

Chemical ReactionWhen a substance

goes through a reaction and changes

into another substance.

Page 3: Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

Chemical EquationsA formula which

shows how elements or compounds react to form new compounds

Page 4: Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

2H+ + O-2 H2O

Page 5: Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

Parts of a chemical equations

• Reactants

• Yield Sign

• Products

Page 6: Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

ReactantsThe elements or

compounds that are found on the left side

of the yield sign

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Yield SignAn arrow found in the equation which works

like an equal sign

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Products

The elements or compounds that are

found on the right side of the yield sign

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Coefficient

Is the number found in front of an ion or

compound. It tells the number of that ion or compound you have

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Balanced Equation

For each element in a chemical equation, the same number of each element must be found on the left side of the

arrow as on the right side

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All chemical equations must be balanced.

Page 12: Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

To balance an equation, you can change the

coefficient. However, you can never, never, never change the subscript.

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Symbols used in Chemical Equations

(l) The chemical is a liquid.

(s) The chemical is a solid.

(g) The chemical is a gas.

(aq) The chemical is aqueous (dissolved in water).

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Synthesis Reactions

A reaction where the reactants combine to

form a bigger compound (also known as combination)

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Synthesis Reactions

2H+ + O-2 H2O

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Decomposition Reaction

A reaction where the reactants break down

(decompose)

Page 17: Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

Decomposition ReactionH2O 2H+ + O-2

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Single Displacement Reaction

A reaction where one element replaces another element in a compound

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Single Displacement Reaction

2Al3+ + 3Ag2S Al2S3 + 6Ag2+

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Double Displacement Reactions

A reaction where the positive ion of two

compounds switch, which forms two new compounds

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Double Displacement Reactions

HCl + NaOH NaCl + H2O

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Combustion

A reaction in which a compound (often

carbon) reacts with oxygen

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CombustionC + O2 CO2

CH4 + 2O2 CO2 + 2H2O

C3H8 + 5O2 3CO2 + 4H2O

C6H12O6 + 6O2 6CO2 + 6H2O

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Redox ReactionsA reaction where one

compound loses electrons and becomes a smaller compound, while another compound gains

electrons and becomes a bigger compound.

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Redox Reactions

C6H12O6 + 6O2 6CO2 + 6H2O

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Oxidized Compound

The compound that loses electrons and becomes a

smaller compound

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Reduced Compound

The compound that gains electrons and becomes a

bigger compound

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Oxidation-Reduction Reaction

Another name for the Redox Reaction