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7.9 Double Replacement Reactions

7.9 Double Replacement Reactions. Jason, Nick, Mike. Double Replacement Reactions - The exchange of positive ions between two compounds. How to complete a DRR: Take the first part of the first compound, and add it to the second part of the second compound.

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7.9 Double Replacement Reactions

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  1. 7.9Double Replacement Reactions Jason, Nick, Mike

  2. Double Replacement Reactions- The exchange of positive ions between two compounds. • How to complete a DRR: • Take the first part of the first compound, and add it to the second part of the second compound. • Take the second part of the first compound and add it to the first part of the second compound. • Always write the metal in the compound first, then the non-metal • Make sure you get the charges from the elements done correctly • Balance your equation and you are done.

  3. Basic DRRs AB + XY --> AY + XB

  4. Examples AgNOȝ + KCl AgCl + KNOȝ **Notice how in this one H and OH combine to form H2O** http://www.dlt.ncssm.edu/tiger/Flash/moles/DoubleDisp_Reaction-Precipitation.html

  5. Examples: AlCl+MgCO3 Al2(CO3)+MgCl2 *Skeleton 2AlCl3+3MgCO3Al2(CO3)+3MgCl2 *Balanced BaCl2+K2CO3 BaCO3+KCl *Skeleton BaCl2+K2CO3 BaCO3+2KCl *Balanced

  6. Try it on your own! Find the skeleton equation for this double replacement reaction and then balance it! HCl + NaOH A.)HOH + NaCl B.) HOH + NaCl3 C.) HNa + ClOH D.) ClOH + HNa HOH + NaCl

  7. Try it on your own! What is the balanced chemical equation for this double replacement reaction? BaCl2 + K2CO3  A.)BaCO3 + 2KCl B.)BaCO2 + 3KCl C.)BaCO + 3KCl D.)3BaCO + KCl BaCO3 + 2KCl

  8. DRR Facts • All compounds with Na, K or NH4 ions in it are soluble in water. • Soap (KOH) was synthesized by Egyptians, Romans, and the Chinese. The Chinese used a double replacement reaction to create it.

  9. Homework Problem Iron(ll) Iodide + Aluminum Sulfide  ??? A.) Turn the names of the compounds into formulas. B.) Finish the skeleton equation. C.) Balance the equation using coefficients.

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