Equations
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Equations. Chemical Reaction. When a substance goes through a reaction and changes into another substance. Chemical Equations. A formula which shows how elements or compounds react to form new compounds. 2H + + O -2  H 2 O. Parts of a chemical equations. Reactants Yield Sign Products.

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Equations

Equations


Chemical reaction

Chemical Reaction

When a substance goes through a reaction and changes into another substance.


Chemical equations

Chemical Equations

A formula which shows how elements or compounds react to form new compounds


2h o 2 h 2 o

2H+ + O-2 H2O


Parts of a chemical equations

Parts of a chemical equations

  • Reactants

  • Yield Sign

  • Products


Reactants

Reactants

The elements or compounds that are found on the left side of the yield sign


Yield sign

Yield Sign

An arrow found in the equation which works like an equal sign


Products

Products

The elements or compounds that are found on the right side of the yield sign


Coefficient

Coefficient

Is the number found in front of an ion or compound. It tells the number of that ion or compound you have


Balanced equation

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


All chemical equations must be balanced

All chemical equations must be balanced.


Equations

To balance an equation, you can change the coefficient. However, you can never, never, never change the subscript.


Symbols used in chemical equations

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).


Synthesis reactions

Synthesis Reactions

A reaction where the reactants combine to form a bigger compound (also known as combination)


Synthesis reactions1

Synthesis Reactions

2H+ + O-2 H2O


Decomposition reaction

Decomposition Reaction

A reaction where the reactants break down (decompose)


Decomposition reaction1

Decomposition Reaction

H2O  2H+ + O-2


Single displacement reaction

Single Displacement Reaction

A reaction where one element replaces another element in a compound


Single displacement reaction1

Single Displacement Reaction

2Al3+ + 3Ag2S  Al2S3 + 6Ag2+


Double displacement reactions

Double Displacement Reactions

A reaction where the positive ion of two compounds switch, which forms two new compounds


Double displacement reactions1

Double Displacement Reactions

HCl + NaOH  NaCl + H2O


Combustion

Combustion

A reaction in which a compound (often carbon) reacts with oxygen


Combustion1

Combustion

C + O2CO2

CH4 + 2O2 CO2 + 2H2O

C3H8 + 5O23CO2 + 4H2O

C6H12O6 + 6O2 6CO2 + 6H2O


Redox reactions

Redox Reactions

A reaction where one compound loses electrons and becomes a smaller compound, while another compound gains electrons and becomes a bigger compound.


Redox reactions1

Redox Reactions

C6H12O6 + 6O2  6CO2 + 6H2O


Oxidized compound

Oxidized Compound

The compound that loses electrons and becomes a smaller compound


Reduced compound

Reduced Compound

The compound that gains electrons and becomes a bigger compound


Oxidation reduction reaction

Oxidation-Reduction Reaction

Another name for the Redox Reaction


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