1. Single Displacement Reactions

2. Evidence of Chemical Reactions
Change in colour
Change in odour
Formation of a gas
Formation of a precipitate
Release or absorption of energy (heat, light)

3. Mg(s) + 2AgNO3(aq)  2Ag(s) + Mg(NO3)2(aq)
Single Displacement
One element replaces another element from a compound
X + AB  AX + B
Mg(s) + 2AgNO3(aq)  2Ag(s) + Mg(NO3)2(aq)

4. Single Displacement

5. Electronic Lab

6. The Activity Series
If the single element is above the element in the compound, a single displacement reaction will occur.

7. Some Examples Metal and an ionic compound
aluminum and nickel (II) chloride
lead and zinc nitrate
Metal and water or an acid (“Reactivity of Metals Lab”)
calcium and water
calcium and hydrochloric acid
Halogens
iodine and potassium chloride
fluorine and sodium bromide

8. Some Examples Metal and an ionic compound
2 Al(s) NiCl2(aq)  2 AlCl3(aq) Ni(s)
Pb(s) + Zn(NO3)2(aq)  NR
Metal and water or an acid (“Reactivity of Metals Lab”)
Ca(s) H2O(l)  Ca(OH)2(aq) + H2(g)
Ca(s) HCl(aq)  CaCl2(aq) + H2(g)
Halogens
I2(s) + KCl(aq)  NR
F2(g) + NaBr(aq)  NaF(aq) + Br2(l)

9. Practice Reference p. 123-128 p. 128 #1-5
Prelab: Testing the Activity Series