Quiz Write the balanced formula equation for the following reaction: 1) Solid barium and oxygen gas react to produce solid barium oxide. Write the balanced chemical equations for the following reactions: 2) Gaseous hydrogen chloride reacts with gaseous ammonia to produce solid ammonium chloride. 3) Aqueous lead (II) nitrate reacts with aqueous potassium iodide to produce solid lead (II) iodide and aqueous potassium nitrate

Classifying Chemical Reactions

Synthesis Reaction A + B  AB Fe(s) + Cl2(g)  FeCl3

Combustion Reaction Requires oxygen H2(g) + O2(g)  H2O(g) CH4(g) + O2(g)  CO2(g) + H2O(g)

Decomposition Reaction AB  A + B NaCl(s)  Na(s) + Cl2(g)

Single-Replacement Reaction A + BX  AX + B Cu(s) + AgNO3(aq)  Ag(s) + Cu(NO3)2(aq)

Replacement Reactions One element takes the place of a similar element Metal replaces another metal Metal replaces hydrogen in water Metal replaces hydrogen in an acid Halogens replace Activity series used to determine if reaction occurs (Figure 12 p 748)

Double-Replacement Reaction AX + BY  AY + BX KCN(aq) + HBr(aq)  KBr(aq) + HCN(g)

Double Replacement Reactions Formation of precipitate KI(aq) + Pb(NO3)2(aq) → PbI2(s) + KNO3(aq) Formation of gas FeS(s) + HCl(aq) → H2S(g) + FeCl2(aq) Formation of water HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)