Balancing Chemical Equation Practice

Balancing chemical equations worksheet Writing Equations for Combustion Reactions 1. Write a balanced equation for the combustion of gaseous butane (C4H10), a fuel used in portable stoves and grills, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water. Write a skeletal (unbalanced) equation by writing chemical formulas for each of the reactants and products. Balance atoms that occur in more complex substances first. Always balance atoms in compounds before atoms in pure elements. Begin with C: Balance H: Balance atoms that occur as free elements on either side of the equation last. Always balance free elements by adjusting the coefficient on the free element. If the balanced equation contains coefficient fractions, clear these by multiplying the entire equation by the denominator of the fraction Check answer Balance O: Balancing Chemical Equations Containing Ionic Compounds with Polyatomic Ions Write a balanced equation for the reaction between aqueous strontium chloride and aqueous lithium phosphate to form solid strontium phosphate and aqueous lithium chloride. Write a skeletal equation by writing chemical formulas for each of the reactants and products Balance metal ions (cations) first. If a polyatomic cation exists on both sides of the equation, balance it as a unit. Begin with Sr2+: Balance nonmetal ions (anions) second. If a polyatomic anion exists on both sides of the equation, balance it as a unit. Balance PO43–: Balance Li+: Balance Cl–: Check to make certain the equation is balanced by summing the total number of each type of ion on both sides of the equation 2. Write a balanced equation for the combustion of liquid methyl alcohol (CH 3OH). Balancing Equations Practice Worksheet 1) ____ NaBr + ____ H3PO4  ____ Na3PO4 + ____ HBr 2) ____ Ca(OH)2 + ____ Al2(SO4)3  ____ CaSO4 + ____ Al(OH)3 3) ____ Mg + ____ Fe2O3  ____ Fe + ____ MgO 4) ____ C2H4 + ____ O2  ____ CO2 + ____ H2O 5) ____ PbSO4  ____ PbSO3 + ____ O2 6) ____ NH3 + ____ I2  ____ N2I6 + ____ H2 7) ____ H2O + ____ SO3  ____ H2SO4 8) ____ H2SO4 + ____ NH4OH  ____ H2O + ____ (NH4)2SO4 Part II 1) ___ NaNO3 + ___ PbO  ___ Pb(NO3)2 + ___ Na2O 2) ___ AgI + ___ Fe2(CO3)3  ___ FeI3 + ___ Ag2CO3 3) ___ C2H4O2 + ___ O2  ___ CO2 + ___ H2O 4) ___ ZnSO4 + ___ Li2CO3  ___ ZnCO3 + ___ Li2SO4 5) ___ V2O5 + ___ CaS  ___ CaO + ___ V2S5 6) ___ Mn(NO2)2 + ___ BeCl2  ___ Be(NO2)2 + ___ MnCl2 7) ___ AgBr + ___ GaPO4  ___ Ag3PO4 + ___ GaBr3 8) ___ H2SO4 + ___ B(OH)3  __ B2(SO4)3 + ___ H2O 9) ___ S8 + ___ O2  ___ SO2 10) ___ Fe + ___ AgNO3  ___ Fe(NO3)2 + ___ Ag Part III 1) ____ AlBr3 + ____ K  ____ KBr + ____ Al 2) ____ FeO + ____ PdF2  ____ FeF2 + ____ PdO 3) ____ P4 + ____ Br2  ____ PBr3 4) ____ LiCl + ____ Br2  ____ LiBr + ____ Cl2 5) ____ PbBr2 + ____ HCl  ____ HBr + ____ PbCl2 6) ____ CoBr3 + ____ CaSO4  ____ CaBr2 + ____ Co2(SO4)3 7) ____ Na3P + ____ CaF2  ____ NaF + ____ Ca3P2 8) ____ Mn + ____ HI  ____ H2 + ____ MnI3 9) ____ Li3PO4 + ____ NaBr  ____ Na3PO4 + ____ LiBr 10) ____ CaF2 + ____ Li2SO4  ____ CaSO4 + ____ LiF 11) ____ HBr + ____ Mg(OH)2  ____ MgBr2 + ____ H2O 12) ____ LiNO3 + ____ CaBr2  ____ Ca(NO3)2 + ____ LiBr 13) ____ AgNO3 + ____ Li  ____ LiNO3 + ____ Ag 14) ____ Si(OH)4 + ____ NaBr  ____ SiBr4 + ____ NaOH 15) ____ NaCN + ____ CuCO3  ____ Na2CO3 + ____ Cu(CN)2