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A word about …. Single Replacement Reactions. A + BX  AX + B Element + Compound  New Element + New Compound. Single Replacement Rxns. 2 Li(s) + 2 H 2 O(l)  2 LiOH ( aq ) + H 2 (g). Type #1:metal replaces a hydrogen in water molecule or an acid

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A word about

A word about ….


Single replacement reactions

Single Replacement Reactions

A + BX  AX + B

Element + Compound 

New Element + New Compound


Single replacement rxns

Single Replacement Rxns

2 Li(s) + 2 H2O(l)  2 LiOH(aq) + H2(g)

Type #1:metal replaces a hydrogen in water molecule or an acid

always get hydrogen Hydrogen gas


Single replacement rxns1

Single Replacement Rxns

Type #2: one metal replaces another metal in a compound

Cu(s) + 2 AgNO3(aq) 

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


Single replacement reactions1

Single Replacement Reactions

Metals have different reactivities

must predict if given metal and given compound will react or not


Single replacement rxns2

Single Replacement Rxns

  • Table J is an activity series

    • more reactive a metal is, the easier it loses its valence electrons

  • most active metal at top

  • least active metal at bottom

  • use Table J to determine if reaction will occur


Single replacement reactions2

Single Replacement Reactions

Type #3: nonmetal replaces another nonmetal in compound

  • Nonmetal often is halogen

  • Halogens have different reactivities (Table J)

  • Most active halogen = F (top)

  • Least active halogen = I (bottom)


Single replacement rxns3

Single Replacement Rxns

rule:

metal CAN replace any metal listed BELOW itself on table J

nonmetalCAN replace any nonmetallisted BELOW itself on table J

- CANNOT replace metal listed above itself on table J


Use table j to predict if these reactions occur

KCl(aq) + Zn(s) <not balanced>

No

No

AlCl3(aq) + Sn(s) <not balanced>

No

Ti(NO3)2(aq) + Pb(s)

No

CaF2(aq) + I2(g)

Use Table J to predict if these reactions occur

  • K(s) + ZnCl2(aq) 

  • Fe(s) + Na3PO4(aq) 

  • Cu(s) + Mg(NO3)2(aq) 

  • Al(s) + SnCl2(aq) 

  • Ca(s) + KBr(aq) 

  • Ti(s) + Pb(NO3)2(aq) 

  • Cl2(g) + HF(aq) 

  • F2(g) + CaI2(aq) 


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