Balancing Reactions Balancing Reactions Choose the largest compound

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

_ Mn. Br 3(aq) + _ F 2(g) _ Mn. F 3(aq) + _ Br 2(g)

_ Fe. Cl 3 + _ K 2 CO 3 _ Fe 2(CO 3)3 + _ KCl

_Na. HCO 3 + Heat _Na 2 CO 3 + _H 2 O + _CO 2

__H 3 PO 4 + __NH 3 __(NH 4)3 PO 4

__C 4 H 10 O 2 + __O 2 __CO 2 + __H 2 O

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

Double Displacement or Metathesis • Two compounds exchange negative portions • Change of phase a must

Synthesis • Smaller molecules or elements combine to make larger molecules

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

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

Balance & Classify the Following Reactions

___H 2 SO 4 + ___Al(OH)3 ___Al 2(SO 4)3 + ___H 2 O

___K 3 PO 4 + ___Pb(NO 3)2 ___Pb 3(PO 4)2 + ___KNO 3

_ Mn. Br 3(aq) + _ F 2(g) _ Mn. F 3(aq) + _ Br 2(g)

_ Fe. Cl 3 + _ K 2 CO 3 _ Fe 2(CO 3)3 + _ KCl

Ca. CO 3(s) + H 2 O + CO 2 Ca(HCO 3)2(aq)

__H 3 PO 4 + __NH 3 __(NH 4)3 PO 4

__C 4 H 10 O 2 + __O 2 __CO 2 + __H 2 O