Balancing Reactions

Balancing Reactions• Choose the largest compound

• Make its coefficient 1

• Choose any element in that compound that appears in only 1 other location

•Balance that element with coefficients where that element appears

•Repeat until all elements are balanced

•Double if on half-unit

_ MnBr3(aq) + _ F2(g)

_ MnF3(aq) + _ Br2(g)

2 MnBr3(aq) + 3 F2(g)

2 MnF3(aq) + 3 Br2(g)

_ FeCl3 + _ K2CO3

_ Fe2(CO3)3 + _ KCl

_NaHCO3 + Heat

_Na2CO3 + _H2O + _CO2

Drill: Balance Rxn__ Fe(NO3)3 + __ K2SO4

__ Fe2(SO4)3 + __ KNO3

__H3PO4 + __NH3

__(NH4)3PO4

__C4H10O2 + __O2

__CO2 + __H2O

Types of Reactions

•Single Displacement

•Double displacement

•Synthesis

•Decomposition

•Combustion

Single Displacement•A Metal or hydrogen replaces the positive portion of a compound or a nonmetal does it for the negative portion

_ CaBr2(aq) + _ F2(g)

_ CaF2(aq) + _ Br2(g)

Double Displacement•Two compounds exchange negative portions

•Change of phase a must

Double Displacement__ Ca(NO3)2 + __ K2SO4

__ CaSO4 + __ KNO3

Synthesis•Smaller molecules or elements combine to make larger molecules

Synthesis

_CaO + _CO2

_CaCO3

Decomposition•Larger molecules break down to form smaller molecules or elements

Decomposition

_MgCO3 + Heat

_MgO + _CO2

Combustion•A carbon compound is combined rapidly with oxygen producing carbon dioxide & water

Combustion

__C5H12 + __O2

__CO2 + __H2O

Name substances, then balance &

classify the following reactions

___H2SO4 + ___Al(OH)3

___Al2(SO4)3 + ___H2O

___K3PO4 + ___Pb(NO3)2

___Pb3(PO4)2 + ___KNO3

_ MnBr3(aq) + _ F2(g)

_ MnF3(aq) + _ Br2(g)

_ FeCl3 + _ K2CO3

_ Fe2(CO3)3 + _ KCl

CaCO3(s) + H2O + CO2

Ca(HCO3)2(aq)

__H3PO4 + __NH3

__(NH4)3PO4

__C4H10O2 + __O2

__CO2 + __H2O