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Balancing Equations
 

Balancing Equations

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    Balancing Equations Balancing Equations Presentation Transcript

    • Synthesis, Decomposition, Single, or Double Replacement? 1. N2 + 3H2 2NH3 1. Synthesis 2. 2Br2 + 2H2O  4HBr + O2 2. Singe Replacement 3. 2KBr + H2SO4  K2SO4 + 2HBr 3. Double Replacement 4. 4. H2SO3  H2O + SO2 Decomposition
    • Review Types of chemical reactions: Synthesis Decomposition Replacement: single and double
    • Balancing Equations Balanced equation- correct coefficients in place so the same numbers of, and types of, atoms appear on both sides of the equation
    • Balancing Equations  2H2 + (1)O2  2(H2O(1)) 4 hydrogen's + 2 oxygen's  2 water molecules
    • Balancing Equations 2H2 + (1)O2  2(H2O(1)) 4 H’s on the left and right 2 O’s on the left and right
    • Balancing Equations 2H2 + O2  2H2O  Only change coefficients- big numbers in front of equations  Not subscripts- little numbers after equations
    • Zn + HCl  ZnCl2 + H2
    • K + H 2O  KOH + H2
    • H 2O 2 + PbS  PbSO4 + H 2O
    • Mg + H 2O  Mg(OH)2 + H2
    • H2 + H2O2 Na O2  H2O  + O2 H2O  + Na2O O2
    • N2 + H2 P4 + O2 C + H2  NH3  P4O6  CH4
    • Al2O3  Fe + H2O Al +  O2 Fe3O4 + H2
    • C2 H6 + O 2  CO2 + H2O
    • Na2SO4 + CaCl2 CaSO4 + NaCl