Chapter 13 & 14 – Chemical Bonding & Reactions Test Review
Name ______
1. Oxygen is a ______molecule which is found in nature as two atoms of the element bonded together.
2. Classify the following equations:
a. CaCl2 + F2 → CaF2 + Cl2 ______
b. 4 Li + O2 → 2 Li2O ______
c. Na2SO4 + Ca(C2H3O2)2 → CaSO4 + 2 NaC2H3O2 ______
d. 2 KClO3 → 2 KCl + 3 O2 ______
3. Most reactions in your body are sped up by enzymes which are referred to chemically as ______. In order to slow down a reaction, a chemist would use a(n) ______.
4. We balance equations to justify the ______, because matter cannot be created or destroyed.
5. Balance the following equation: Na3PO4 + Ca(NO3)2 → NaNO3 + Ca3(PO4)2
6. Identify by name and count how many atoms of each element are in the formula 2 Mg(C2H3O2)2. ______
7. An ionic bond is usually between a ______and a ______.
8. Write the formula for the compound phosphorus trichloride. ______
9. What are the four clues that a chemical reaction is taking place?
a. ______
b. ______
c. ______
d. ______
10. Identify by name the reactants and products in the equation Na2O + H2O → 2 NaOH. ______
11. True / False When balancing chemical equations, you can either add a coefficient or change a formula in the equation.
12. What is the total charge of this compound? (NH4)2CO3 ______
13. Light energy is released in the ______reaction of Chem-Lights (light sticks), whereas energy is taken in during the ______reaction of a chemical ice pack.
14. Use your oxidation chart to write the formula for the following polyatomic ions:
a. aluminum phosphate ______
b. hydrogen peroxide ______
c. aluminum sulfate ______
15. Write the name for the formula Na2O. ______
16. Write the name for the formula NO. ______
17. Identify the elements (by name) and the number of atoms of each for 2 (NH4)3PO4. ______
18. Preservatives are considered to be ______because they are added to foods to slow down the rate at which the food spoils.
19. Four factors that affect the rate of a reaction are:
a. ______
b. ______
c. ______
d. ______
20. Identify by name the polyatomic ion(s) in the compound NH4OH. ______
21. Phosphate is a ______ion.
22. The number of ______of each element in the formula of a compound is written as a subscript number, whereas the ______of the element is written as a superscript number.
23. A coefficient in front of a formula represents how many ______of that formula.
24. Write the formula for the following covalent bonds:
a. dinitrogen monoxide ______
b. sulfur trioxide ______
25. Which is an example of a chemical reaction taking place?
a fire being ignited by a match or an ice cube feeling cold melting in your hand
Honors: Determine the gram formula mass of the compound 3 CaCl2. ______