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A word about ….

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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A word about ….

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  1. A word about ….

  2. Single Replacement Reactions A + BX  AX + B A replaces B in compound BX [Element + Compound  New Element + New Compound]

  3. 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

  4. Single Replacement Reactions Metals have different reactivities Canpredictif given metal and given compound will react or not

  5. 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

  6. 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

  7. 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

  8. 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)

  9. 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

  10. 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)

  11. NR Single Replacement Reaction Br2(g) + 2 NaF(aq)  ? Br2 is below F2 in Table J This reaction does not occur

  12. 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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