Chemistry Pearson Ch. 11 Quiz Answer Keys

Chapter Quiz

Fill in the word(s) that will make each statement true

1. A(n) SKELETON equation is one in which the relative amounts of the reactants and products are not indicated.

2. A chemical reaction can be represented by a chemical EQUATION.

3. The first step in balancing an equation is to write the correct FORMULAS for all the reactants and products.

4. An equation obeys the laws of conservation of mass if it has been properly BALANCED.

5. In an equation, formulas for the products appear on the RIGHT and the formulas for the reactants appear on the LEFT.

6. The symbol for “yields” or “reacts to produce” is a(n) ARROW.

Balance the following equations and identify any precipitate formed. Complete the equation first if necessary. Write your answer in the space provided

7. HgO(s) → Hg(l) + O₂(g)

   2HgO(s) —> 2Hg(l) + O₂(g)

8. Ag⁺(aq) + Na⁺ (aq) + NO₃^–(aq) + CO₃^2– (aq) → (Hint: Write two equations—a complete ionic equation and a net ionic equation.)

   2Ag⁺(aq) + 2Na⁺(aq) + 2NO3 ^-(aq) + CO2/3^-(aq)

   → 2Νa⁺(aq) + 2NO3 ^-(aq) + Ag2CO3(s)

   net: 2Ag⁺(aq)  CO3 ^2-(aq) → Ag2CO3(s)

9. C₄H₈(g) + O₂(g)→ CO₂(g) + H₂O(g)

   C4H8(g) + 6O2(g) → 4CO2(g) + 4H2O(g)

10. Na(s) + Br₂(l) →

    2Na(s) + Br2(l) → 2NaBr(s)