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Types of Chemical Reactions: Single and Double Displacement

Types of Chemical Reactions: Single and Double Displacement. Single Displacement reactions. Single displacement reactions: are chemical changes that involve an element and a compound as reactants One element displaces or replaces another element from a compound.

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Types of Chemical Reactions: Single and Double Displacement

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  1. Types of Chemical Reactions:Single and Double Displacement

  2. Single Displacement reactions • Single displacement reactions: are chemical changes that involve an element and a compound as reactants • One element displaces or replaces another element from a compound

  3. Single displacement reactions have the following general formula Z + AB  ZB + A OR Y + AB  AY + B • Case 1: the metal Z has taken the place of the element A (metal always replaces metal) • Case 2: the non-metal Y has taken the place of element (non-metal always replaces non-metal)

  4. An example: a coil of magnesium ribbon is placed in a solution of silver nitrate Magnesium + silver nitrate  silver + magnesium nitrate Mg + 2AgNO3 2Ag + Mg(NO3)2

  5. Another example: bromine is added to a solution of calcium iodide • Bromine will replace/displace the iodide ion Bromine + calcium iodide  iodine + calcium bromide Br2 + CaI2  I2 + CaBr2

  6. Double Displacement Reactions • Double displacement reactions: occur when elements in different compounds displace each other or exchange places • They have the following general formula: AB + XY AY + XB • A and X are metallic elements while B and Y are non-metallic elements.

  7. Example: lead (II) nitrate and potassium iodide Lead (II) nitrate + potassium iodide  lead (II) iodide + potassium nitrate Pb(NO3)2 + 2KI  PbI2 + 2KNO3

  8. HOMEWORK • Pg. 241 # 1-3

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