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Single replacement - one element replaces another in a compound happens in one of 2 ways

Types of Reactions synthesis - formation of a new substance by combining 2 or more original substances A + B ---> C Ex: 2 H 2 + O 2 ---> 2 H 2 O. Decomposition - the breaking down of a substance into two or more new substances C ---> A + B Ex. 2 KClO 3 ---> 2 KCl + O 2.

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Single replacement - one element replaces another in a compound happens in one of 2 ways

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  1. Types of Reactionssynthesis - formation of a new substance by combining 2 or more original substancesA + B ---> CEx: 2 H2 + O2 ---> 2 H2O

  2. Decomposition - the breaking down of a substance into two or more new substancesC ---> A + BEx. 2 KClO3 ---> 2 KCl + O2

  3. Single replacement - one element replaces another in a compoundhappens in one of 2 ways

  4. A + BC ---> AC + Bthis happens if A and B are metals (or hydrogen)consult metal activity series

  5. 2Na + Ni(NO3)2 ---> 2NaNO3 + Nisince sodium is a more active metal than nickel, this reaction will happen

  6. H2SO3 + Cu ---> no reactioncopper is less active than hydrogen and will not replace it in the reaction

  7. X + YZ ---> YX + Zthis happens if X and Z are nonmetals, specifically halogenshalogen activity is in order from periodic table

  8. F > Cl > Br > I > AtF will replace any other halogen but Cl can only replace Br, I, or AtCl2 + KBr ---> KCl + Br2

  9. Double replacement reaction - two compounds react and the cations from each substance swap placesAB + CD ---> AD + CB

  10. AgNO3 + Mg3(PO4)2 ---> Mg(NO3)2 + Ag3PO4The silver and the magnesium exchanged places. Notice that you must be sure to write the correct formulas.

  11. Combustion - the reaction of a hydrocarbon with oxygen to produce carbon dioxide and waterCxHy + O2 ---> CO2 + H2OCxHyOz + O2 ---> CO2 + H2O

  12. C4H10 + O2 ---> CO2 + H2Oeven/odd dilemma? Double the coefficient that’s odd and adjust accordingly

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