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Single Displacement Reactions. Single Displacement Reactions. An element takes the place of another element that is in a compound Could be a metal replacing a metal or a non-metal replacing a non-metal General formulas: A + BC  AC + B (A and B are metals)

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single displacement reactions1
Single Displacement Reactions
  • An element takes the place of another element that is in a compound
  • Could be a metal replacing a metal or a non-metal replacing a non-metal
  • General formulas:
    • A + BC  AC + B (A and B are metals)
    • A + BC  BA + C (A and C are nonmetals)‏
    • +  +
example 1 metals
Example 1 (metals)
  • Cu(s) + 2AgNO3(aq)  Cu(NO3)2(aq) + Ag(s)
  • This reaction does not go in reverse! Why can’t Ag replace Cu? It is because of the reactivity of the metals.
  • The “Activity Series” is a list of elements that is organized according to their chemical reactivity.
activity series for metals
Activity Series for Metals
  • Lithium
  • Potassium
  • Calcium
  • Sodium
  • Magnesium
  • Aluminium
  • Zinc
  • Chromium
  • Iron
  • Nickel
  • Tin
  • Lead
  • Hydrogen
  • Copper
  • Mercury
  • Silver
  • Platinum
  • Gold

Most reactive

Least reactive

example 2 metals
Example 2 (metals)
  • Use the activity series to predict if the following single displacement reaction occurs

Al(s) + NiBr3(aq) __________

  • Write the balanced chemical equation
hydrogen
Hydrogen???
  • Notice that hydrogen is on the activity series and it is not a metal!
  • Hydrogen may be displaced from most acids by all metals above it
  • Hydrogen may only be displaced from water (at room temp.) by those above magnesium
example 3 hydrogen
Example 3 (hydrogen)
  • Use the activity series to predict if the following single displacement reaction occurs

Ag(s) + HBr(aq) __________

  • Write the balanced chemical equation, if reaction occurs
example 4 hydrogen
Example 4 (hydrogen)
  • Use the activity series to predict if the following single displacement reaction occurs

K(s) + H2O(l) __________

  • Write the balanced chemical equation, if reaction occurs
example 5 nonmetals
Example 5 (nonmetals)
  • Non-metals are negatively charged, so it can be replaced with only another non-metal.
  • F2(g) + 2NaI(s)  I2 (s) + 2NaF (s)
  • There is a separate activity series for halogens
activity series for nonmetals
Activity Series for Nonmetals
  • fluorine
  • chlorine
  • bromine
  • iodine

Most reactive

Least reactive

example 6 nonmetals
Example 6 (nonmetals)
  • Use the activity series to predict if the following single displacement reaction occurs

Br2(g) + NaCl(aq) __________

  • Write the balanced chemical equation, if it does occur
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