1. Bonding, pH and Balancing Chemical Equations Quiz Know – how to balance chemical equations – ionic and covalent bonds – acids and bases – the pH scale

2. In an experiment combining vinegar and baking soda, gas is given off. In this chemical reaction the gas is a A. reactant B. suspension C. element D. product

3. In the chemical formula CO 2, what does the subscript 2 represent? A. The number of atoms in carbon dioxide B. The number of carbon dioxide molecules C. The number of oxygen atoms in carbon dioxide D. The number of carbon atoms in carbon dioxide

4. When a base is mixed with an acidic solution, neutralization occurs because the A. Acid evaporates B. Base chemically reacts with the acid C. Mass of solution increases D. Base reaches absolute zero

5. Which equation is balanced? A. 2Fe + CO 2  Fe + 2CO B. Fe + 2CO  2FeCO C. 2Fe + 2CO  2FeCO D. 2FeCO 2  2FeCO

6. In an experiment combining vinegar and baking soda, gas is given off. In this chemical reaction the vinegar and baking soda are A. reactants B. products C. elements D. suspensions

7. Which of the following substances has a neutral pH? A. Acid rain pH 6.0 B. Lemon juice pH 2 C. Distilled water pH 7 D. Household Ammonia pH 12

8. Which of the following substances would neutralize lemon juice pH 2? A. Acid rain pH 6.0 B. Lemon juice pH 2 C. Distilled water pH 7 D. Household Ammonia pH 12

9. Nonmetals bond with nonmetals during A. Nonmetal bonding B. The evening C. Ionic bonding D. Covalent bonding

10. Nonmetals bond with metals during A. Nonmetal bonding B. The evening C. Ionic bonding D. Covalent bonding

11. In an ionic bond, when atoms lose or gain an electron they are called a(n) A. Element B. Ion C. Metalloid D. Noble gas

12. Which type of bond is pictured here? A. Nonmetal bonding B. The evening C. Ionic bonding D. Covalent bonding

13. In salt, when chlorine (Cl) and sodium (Na) bond, chlorine gains one sodium electron and is now A. Cl +1 B. Cl -1 C. NaCl +1 D. NaCl

14. On the pH scale 7 is A. An acid B. A base C. neutral D. An ion

15. On the pH scale 12 is A. An acid B. A base C. neutral D. An ion

16. On the pH scale 5 is A. An acid B. A base C. neutral D. An ion

17. Select the balanced equation A. CO 2 + 2Fe(CO 2 ) 2  2CO + Fe 4 CO B. CO 2 + 2Fe(CO 2 )  4COFe C. CO 2 + Fe(CO 2 ) 2  2CO + FeCO 4 D. CO 2 + 2Fe(CO 2 ) 2  3CO + FeCO

18. Balance the following equation ____ K + ____ Cl 2  ____ KCl 2 K + 1 Cl 2  2 KCl

19. Balance the following equation ____ Al + ____ HCl  ____ H 2 + ____ AlCl 3 2 Al + 6 HCl  3 H 2 + 2 AlCl 3

20. Baking soda is added to vinegar. The carbon dioxide and water released in the chemical reaction is a A. reactant B. A base C. product D. An ion

21. Which type of bond is pictured here? A. Nonmetal bonding B. The evening C. Ionic bonding D. Covalent bonding