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Writing Chemical Equations

Writing Chemical Equations. By Ari Dinero and Osama Aly. Skeleton Equation. Definition - A chemical equation that does not indicate the relative amounts of the reactants and products. Examples - Reactants Products Fe+O 2 Fe 2 O 3 Al+Cl 2 AlCl 3. Designative Symbols. Example -

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Writing Chemical Equations

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  1. Writing Chemical Equations By Ari Dinero and Osama Aly

  2. Skeleton Equation Definition- A chemical equation that does not indicate the relative amounts of the reactants and products. Examples- ReactantsProducts Fe+O2Fe2O3 Al+Cl2AlCl3

  3. Designative Symbols Example- Fe(s)+O2(g)Fe2O3(s)

  4. Symbols Used in Equations Examples- Fe+O2 Fe2O3or Fe+O2 Fe2O3 NH4Cl(s) NH3(g)+HCl(g)

  5. Application Symbols Catalyst- A substance that speeds up a reaction without being used up. Examples- MnO2 H2O2(aq) H2O(l)+O2(g) CaCo3(s) CaO(s)+CO2(g)

  6. Practice Problems… What does this sign mean? • Divides by • Yields to • Reflects • Reversible

  7. CONGRATS!!!

  8. Solve… What is the most common product of H₂ and O₂? A) HO B) H₂O2 C) HO₂ D) H₂O

  9. Righty-O

  10. Homework… Write skeleton equations for question 1-3 • Mg+O2 _________ • K + ____ KCl • CaO+ ____ CaCO3 • Write this as a formula: Calcium oxide reacts with carbon dioxide to produce calcium carbonate

  11. Keep This in Mind… • Don’t be confused by all of the different symbols…most are interchangeable! • Remember the symbols meanings for real-world application and understanding • Don’t overthink problems • Use basic skills acquired in previous chapters Helpful Sites- • http://web.jjay.cuny.edu/ • http://www.encyclopedia.com/topic/Chemical_equations.aspx • http://dl.clackamas.edu/ch104-04/skeleton.htm

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