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A word about …. Single Replacement Reactions. A + BX  AX + B A replaces B in compound BX [Element + Compound  New Element + New Compound]. Three types of SR reactions: Metal replaces hydrogen in a compound Metal replaces another metal in a compound

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single replacement reactions
Single Replacement Reactions

A + BX  AX + B

A replaces B in compound BX

[Element + Compound  New Element + New Compound]

slide3
Three types of SR reactions:
  • Metal replaces hydrogen in a compound
  • Metal replaces another metal in a compound
  • Nonmetal replaces a nonmetal in a compound
single replacement reactions1
Single Replacement Reactions

Metals have different reactivities

Canpredictif given metal and given

compound will react or not

single replacement rxns
Single Replacement Rxns
  • Table J is activity series
    • more reactive metals lose valence electrons more easily
    • determine if a reaction will occur
  • most activemetal is attop
  • least activemetal is atbottom
single replacement rxns1
Single Replacement Rxns

The rule -

metal can:

  • replaceany metal listed below itself on table J

metalcannot:

  • replace any metal listed above itself on table J
ag s cu no 3 2 aq
Ag(s) + Cu(NO3)2(aq)  ?
  • What metal is looking to replace what metal?
    • can Ag replace Cu?
  • Locate Ag and Cu in Table J
  • Ag is below Cu so this reaction will not go
    • Ag is less reactive than Cu

NR

cu s agno 3 aq
Cu(s) + AgNO3(aq)  ?
  • What metal is looking to replace what metal?
    • can Cu replace Ag?
  • Locate Cu and Ag in Table J
  • Cu is above Ag in Table J
    • Cu is more reactive than Ag
    • This reaction will go

 Ag(s) + Cu(NO3)2(aq)

Balance!!

Cu(s) + 2AgNO3(aq) 2Ag(s) + Cu(NO3)2(aq)

slide9
Nonmetals also have different reactivities
    • Look at Table J
    • Halogens are often the nonmetal
  • Most active halogen = fluorine at top
  • Least active halogen = iodine at bottom
  • Nonmetals can only replace nonmetal below itself on the table
single replacement reactions2

This reaction occurs because F2 is above Br2

Single Replacement Reactions

F2(g) + 2 NaBr(aq)  2 NaF(aq) + Br2(l)

  • F looks to replace Br (not Na)
single replacement reaction

NR

Single Replacement Reaction

Br2(g) + 2 NaF(aq)  ?

Br2 is below F2 in Table J

This reaction does not occur

use table j to predict if these reactions occur

Yes: KCl + Zn

No

No

Yes: AlCl3 + Sn

No

Yes: Ti(NO3)2 + Pb

No

Yes: CaF2 + I2

Use Table J to predict if these reactions occur

K + ZnCl2

Fe + Na3PO4

Cu + Mg(NO3)2

Al + SnCl2

Ca + KBr 

Ti + Pb(NO3)2

Cl2 + HF 

F2 + CaI2

2

2

2

3

2

3

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