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Double Displacement Reactions

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  1. Double Displacement Reactions Science 10 Chemical Reactions

  2. 5 Types of Reactions (Rxn’s) • Double Displacement • Single Displacement • Formation • Decomposition • Combustion

  3. Double Displacement Rxn’s • The reaction of two ionic compounds in which positive and negative ions rearrange, producing two new compounds. • AB + CD  AD + CB

  4. Double Displacement Analogy • This is like a dance where two couples are dancing and they exchange partners. • Before the exchange everybody is dancing. • After the exchange, everybody is still dancing but with a different partner.

  5. Double Displacement Example • Predict the products of the following reaction: • cobalt(II) nitrate + aluminium chloride  • The metal ions (cobalt(II) and aluminium) switch places.

  6. Example (cont’d) • cobalt(II) nitrate + aluminium chloride  cobalt(II) chloride + aluminium nitrate • Notice that the charge on each metal ion remains the same on both sides of the reaction arrow. • Remember to balance the reaction after you have predicted the products • 3Co(NO3)2 + 2AlCl3 3CoCl2 + 2Al(NO3)3