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Balancing Equations

Balancing Equations. 08 /15/12. 10.1 Reactions and Equations. The process by which the atoms of one substance are rearranged to form different substances is called a chemical reaction . Subscript Coefficient CH 4 + 2 O 2  CO 2 + 2 H 2 O

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Balancing Equations

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  1. Balancing Equations 08/15/12

  2. 10.1 Reactions and Equations • The process by which the atoms of one substance are rearranged to form different substances is called a chemical reaction. Subscript Coefficient CH4 + 2 O2 CO2 + 2 H2O Reactant Product

  3. Law of conservation of mass- that mass is neither created nor destroyed during a chemical reaction but is conserved. • We balance equations because it shows that the reactions obeys the law of conservation of mass.

  4. Balancing Equations • Steps to balancing equations: • Draw a line to separate the reactants from the products • Count the atoms of the elements in the reactant. • Count the atoms of the elements in the product. • Change the coefficients (#’s in front) to make the number of atoms of each element equal on both sides of the equation.

  5. Example __Al + ___Fe2O3 ___Fe + ___Al2O3

  6. Example • ___Mg + ____N2 ___Mg3N2

  7. Examples ___Cu(NO3)2 ___CuO + ___NO2 + ___ O2

  8. Example ____C3H8 + ___ O2  ___ CO2 + ____H2O

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