2. Single Replacement One element replaces a similar element in a compound A + BX AX + B A replaces B if A and B are similar Metals can replace less reactive metals Al + Fe(NO 3 ) Al(NO 3 ) + Fe

3. Metals can replace H Mg + HCl MgCl 2 + H 2 Na + H 2 O NaOH + H 2

4. Halogens can replace other halogens Br 2 + KCl KBr + Cl 2

5. Single Replacement Reactions 1) Al + Cu(NO 3 ) 2 2) NaCl + F 2 3) K + H 2 O 4) Na + Mg(OH) 2 5) Ni + FeSO 4

6. Double Replacement Ions of two compounds exchange places AX + BY AY + BX Double Replacement reactions are often evidenced be the formation of a precipitate or the production of a gas

7. Practice 1. HCl (aq) + AgNO 3(aq) 2. CaCl 2(aq) + Na 3 PO 4(aq) 3. Pb(NO 3 ) 2(aq) + BaCl 2(aq) 4. FeCl 3(aq) + NaOH (aq) 5. H 2 SO 4(aq) + NaOH (aq) 6. KOH (aq) + CuSO 4(aq)

8. Mixed Practice State the type, predict the products, and balance the following reactions: 1. BaCl 2 + H 2 SO 4 2. C 6 H 12 + O 2 3. Zn + CuSO 4 4. Cs + Br 2 5. FeCO 3