Single Displacement Reactions

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)

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)

Single Displacement

Electronic Lab http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/redox/home.html

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

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

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)

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