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Prentice Hall Chemistry (c) 2005

Prentice Hall Chemistry (c) 2005. Section Assessment Answers Chapter 11. By Daniel R. Barnes Init: 12/17/2008. bonds broken & reformed. 7. How do you write a word equation?.

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Prentice Hall Chemistry (c) 2005

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  1. Prentice Hall Chemistry(c) 2005 Section Assessment Answers Chapter 11 By Daniel R. Barnes Init: 12/17/2008 bonds broken & reformed

  2. 7. How do you write a word equation? To write a word equation, write the names of the reactants separated by plus signs followed by an arrow, followed by the names of the products separated by plus signs. 8. How do you write a skeleton equation? To write a skeleton equation, write the formulas of the reactants to the left of the arrow and the formulas of the products to the right of the arrow. (Don’t write any coefficients.) 11.1 Section Assessment 9. Describe the steps in writing a balanced chemical equation. To write a balanced chemical equation, first write the skeleton equation for the reaction (see #8). Place whatever coefficients are needed to make the number of atoms of each element the same on the left of the arrow as on the right of the arrow.

  3. heat CuS + O2Cu + SO2(g) heat NaHCO3 Na2CO3 + CO2 + H2O 10.a. “Heating copper (II) sulfide in the presence of diatomic oxygen produces pure copper and sulfur dioxide gas” translates into the following skeleton equation: 10.b. “When heated, baking soda (sodium hydrogen carbonate) decomposes to form the products sodium carbonate, carbon dioxide, and water.” translates into the following skeleton equation: 11.1 Section Assessment

  4. 11.a. “Iron metal and chlorine gas react to form solid iron(III) chloride,” translates into the following balanced chemical equation: 2 Fe(s) + Cl2(g) FeCl3(s) 3 2 2 2 Fe: Cl: 2 1 1 Fe: Cl: 11.1 Section Assessment 3 6 2 4 6

  5. 11.b. “Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas,” translates into the following balanced chemical equation: Al2(CO3)3(s) Al2O3(s) + CO2(g) 3 Al: 2 Al: 2 11.1 Section Assessment C: 3 C: 1 3 O: 9 O: 5 9 Yay! You win . . . . . . a PUPPY!

  6. 11.c. “Solid magnesium reacts with aqueous silver nitrate to form solid silver and aqueous magnesium nitrate,” translates into the following balanced chemical equation: Mg(s) + AgNO3(aq) Ag(s) + Mg(NO3)2(aq) 2 2 Mg: 1 Mg: 1 11.1 Section Assessment Ag: 1 2 Ag: 1 2 N: 1 2 N: 2 O: 3 6 O: 6 Yay! You win . . . . . . HEALTH INSURANCE!

  7. 12.a. SO2 + O2 SO3 2 2 S: 1 2 S: 1 2 O: 4 6 O: 3 6 11.1 Section Assessment 12.b. Fe2O3 + H2 Fe + H2O 3 2 3 Fe: 2 Fe: 1 2 O: 3 O: 1 3 H: 2 6 H: 2 6

  8. 12.c. P + O2 P4O10 4 5 P: 1 4 P: 4 O: 2 10 O: 10 12.d. Al + N2 AlN 2 2 11.1 Section Assessment Al: 1 2 Al: 1 2 N: 2 N: 1 2

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