Single Displacement Reactions

1
Single Displacement Reactions
2
Evidence of Chemical Reactions

1. Change in colour
2. Change in odour
3. Formation of a gas
4. Formation of a precipitate
5. Release or absorption of energy (heat, light)

3
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

• http//group.chem.iastate.edu/Greenbowe/sections/p
  rojectfolder/flashfiles/redox/home.html

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) 3 NiCl2(aq) ? 2 AlCl3(aq) 3
  Ni(s)
• Pb(s) Zn(NO3)2(aq) ? NR
• Metal and water or an acid (Reactivity of Metals
  Lab)
• Ca(s) 2 H2O(l) ? Ca(OH)2(aq) H2(g)
• Ca(s) 2 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