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UNIT 0 – Review, The Structure of the Atom, Bonds and Naming 14. Balancing Chemical Reactions A chemical reaction follows the law of _____________________________ of mass. This means that the quantity of an element before the reaction takes place known as a _____________________ must equal the quantity of that element that is produced, ie the _____________________. The only thing that changes are the bonds between the compounds. Synthesis Decomposition Single Displacement Double Displacement UNIT 0 – Review, The Structure of the Atom, Bonds and Naming 15. Balance the equations below: State the Type of Reaction if Possible a) ____ N2 + ____ H2 à ____ NH3 b) ____ KClO3 à ____ KCl + ____ O2 c) ____ NaCl + ____ F2 à ____ NaF + ____ Cl2 d) ____ H2 + ____ O2 à ____ H2O e) ____ Pb(OH)2 + ____ HCl à ____ H2O + ____ PbCl2 f) ____ AlBr3 + ____ K2SO4 à ____ KBr + ____ Al2(SO4)3 g) ____ CH4 + ____ O2 à ____ CO2 + ____ H2O h) ____ C3H8 + ____ O2 à ____ CO2 + ____ H2O i) ____ C8H18 + ____ O2 à ____ CO2 + ____ H2O j) ____ FeCl3 + ____ NaOH à ____ Fe(OH)3 + ____NaCl k) ____ P + ____O2 à ____P2O5 l) ____ Na + ____ H2O à ____ NaOH + ____H2 m) ____ Ag2O à ____ Ag + ____O2 n) ____ S8 + ____O2 à ____ SO3 o) ____ CO2 + ____ H2O à ____ C6H12O6 + ____O2 p) ____ K + ____ MgBr2 à ____ KBr + ____ Mg q) ____ HCl + ____ CaCO3 à ____ CaCl2 + ____H2O + ____ CO2 r) ____ HNO3 + ____ NaHCO3 à ____ NaNO3 + ____ H2O + ____ CO2 s) ____ H2O + ____ O2 à ____ H2O2 t) BONUS Make your own chemical equation and balance it. * UNIT 0 – Review, The Structure of the Atom, Bonds and Naming Answer Key to 15. a) 1 N2 + 3 H2 à 2 NH3 Synthesis Decomposition Single Displacement Synthesis Double Displacement f) 2 AlBr3 + 3 K2SO4 à 6 KBr + 1 Al2(SO4)3 Double Displacement Combustion * Combustion Combustion Double Displacement Synthesis b) 2 KClO3 à 2 KCl + 3 O2 c) 2 NaCl + 1 F2 à 2 NaF + 1 Cl2 d) 2 H2 + 1 O2 à 2 H2O e) 1 Pb(OH)2 + 2 HCl à 2 H2O + 1 PbCl2 g) 1 CH4 + 2 O2 à 1 CO2 + 2 H2O h) 1 C3H8 + 5 O2 à 3 CO2 + 4 H2O i) 2 C8H18 + 25 O2 à 16 CO2 + 18 H2O j) 1 FeCl3 + 3 NaOH à 1 Fe(OH)3 + 3 NaCl k) 4 P + 5 O2 à 2 P2O5 l) 2 Na + 2 H2O à 2 NaOH + 1 H2 Single Displacement m) 2 Ag2O à 4 Ag + 1 O2 Decomposition Synthesis o) 6 CO2 + 6 H2O à 1 C6H12O6 + 6 O2 Cellular Respiration Single Displacement Non of the Above n) 1 S8 + 12 O2 à 8 SO3 p) 2 K + 1 MgBr2 à 2 KBr + 1 Mg q) 2 HCl + 1 CaCO3 à 1 CaCl2 + 1 H2O + 1 CO2 r) 1 HNO3 + 1 NaHCO3 à 1 NaNO3 + 1 H2O + 1 CO2 None of the Above s) 2 H2O + 1 O2 à 2 H2O2 Synthesis