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Balancing Equations. Alabama Course of Study. 4.) State the law of conservation of matter. 4.1Balancing chemical equations by adjusting coefficients. Chemical Equations.

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Presentation Transcript
alabama course of study
Alabama Course of Study
  • 4.) State the law of conservation of matter.
  • 4.1Balancing chemical equations by adjusting coefficients
chemical equations
Chemical Equations
  • Chemical Equation- representation of a chemical reaction that uses symbols to show the relationship between the reactants and products
    • Reactants- what is put into a reaction
    • Product- what forms after a reaction occurs
an example
An example
  • C +o2 =co2
  • Reactants Product
law of conservation of mass
Law of Conservation of Mass
  • Law of mass of energy- Mass is neither created nor destroyed and both sides of the equation must be equal
how many atoms are in each compound
How many atoms are in each Compound?
  • H2CO3 =___H ___C ___O
  • H20 = ___ H ___0
  • HCl = ___H ___ Cl
  • ZnCl2 = ___Zn ___Cl
  • AgNO3 =___ Ag ___N ___O
  • FeCl2 = ___Fe ___Cl
how many atoms are in each compound1
How many atoms are in each Compound?
  • 2H2CO3 =___H ___C ___O
  • 3H20 = ___ H ___0
  • 4HCl = ___H ___ Cl
  • 2ZnCl2 = ___Zn ___Cl
  • 3AgNO3 =___ Ag ___N ___O
  • 4FeCl2 = ___Fe ___Cl
rules to balancing equations
Rules to balancing equations
  • Rule 1- the superscript or the two inco2 cannot be changed
  • Rule 2- You can add a coefficient or the three in 3co2
  • Rule 3- the atoms on both sides must be equal
more problems
More problems
  • Na + Cl2 = NaCl
  • Mg + N2 = Mg3N2
  • 2KI + Cl2 = KCl + I2
  • FeS +HCl = FeCl2 + H2S
  • Na + O2 = Na20
  • Ag3N = Ag + N
  • P4 + O2 = P2O5
different kinds of chemical reactions
Different kinds of chemical reactions
  • Synthesis reaction- two or more substances form to make one new compound
  • 2Na + Cl2 = 2NaCl
  • 1 + 2 = 3
  • C + 02 = C02
decomposition
Decomposition
  • Decomposition- single compound is broken down into two or more compounds
  • H2CO3 = H20 + C02
  • 3 = 1 + 2
single displacement reactions
Single Displacement Reactions
  • Single displacement- one element takes the place of another element
  • Zn + 2HCl = ZnCl2 + H2
  • 1 + 2x3 = 1x3 + 2
double displacement
Double-displacement
  • Double- displacement- two substances change places with each other
  • NaCl + AgF = NaF + AgCl
  • 1 X2 + 3X4 = 1X4 + 3 X 2