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Date:
Chemistry Final Review
Yay! The Chemistry final is right around the corner. This review covers major topics that
were discussed in class since January. However, anything discussed in class is fair game
for the final. For more room, write your answers on a separate sheet of paper and attach it
to your review.
1) For the three compounds below, identify which is ionic, polar and nonpolar:
C2H6, CO, and NaCl
2) Use the reaction below to answer questions a-b.
CaI2(aq) + Na2SO4(aq)  CaSO4 (?) + 2NaI (?)
a. Which of the products, CaSO4 and NaI, is the precipitate?
a. CaSO4
b. NaI
c. both
d. neither
b. What are the spectator ions in this reaction?
a. Ca2+, 2Ib. 2Na+, SO42c. Ca2+, SO42d. 2Na+, 2I3) Classify reactions a-f from the list below. Each classification is used once.
-single replacement
-double displacement
-acid-base reaction
-synthesis
-decomposition
-combustion
a. C3H8(g) + O2(g)  CO2(g) + H2O(l)
____________________
b. F2(g) + 2NaBr(s)  2NaF(s) + Br2(l)
____________________
c. 2Na (s) + Cl2(g)  2NaCl(aq)
____________________
d. NaI(aq) + AgNO3(aq)  NaNO3(aq) + AgI(s) ____________________
e. KCl (aq)  K (s) + Cl2(g)
____________________
f. HNO3(aq) + NaOH(aq)  H2O(l) + NaNO3(aq) ____________________
4) Write the ionic and net ionic equations for the reaction below:
Molecular:
Pb(NO3)2(aq) + 2NaCl(aq)  PbCl2(s) + 2NaNO3(aq)
Ionic:
Net ionic:
5) Balance the following equations
a.
_____ KBr (aq) + _____ H3PO4 (aq)  _____ K3PO4 (aq) + _____ HBr (aq)
b. _____ Ba(NO3)2 (aq) + ____ Na2CrO4 (aq)  _____ BaCrO4 (aq) + ____ NaNO3 (aq)
6) What do moles have to do with Avogadro?
7) What is the molar mass of sodium carbonate, Na2CO3?
8) How many molecules are in 3 moles of carbon?
9) How many moles are in 162 grams of KCl?
10) What are the different types of energy?
11) Provide an example of an exothermic and an endothermic reaction.
12) Calculate how much heat is needed to raise 122g of water from 25.0°C to 155°C.
13) Why is air (a mixture of oxygen, nitrogen, water vapor and other gas molecules)
considered a solution?
14) It’s a hot day in the summertime. You decide to make a pitcher of Country Time
Lemonade, a powder mix that you mix with water. What is the solute and solvent in this
solution?
15) What is the molarity of a NaCl solution that contains 2.5moles in a total volume of
4.5L?
16) 12L of 6.7M KNO3 is diluted with water to a volume of 25L. What is the new
concentration of this solution?
17) What is the difference between pH and pOH? In other words, what do each measure
for acids and bases?
18) What is the pH of a 4.5x10-6M HNO3?
19) If a solution of HCl has a pH of 3.2, what is the pOH?
20) If NaOH has a pOH of 9.3, what is the [OH-]?
21) A gas inside a sealed chamber has a pressure of 1 atm with a volume of 3.0L. The
volume of the chamber decreases to 1.5L. Without doing any formal calculations, what
should the pressure of the gas become?
22) A bag of potato chips is left inside a car on a hot day at the beach. If the bag’s volume
is approximately 44mL with a temperature of 27C. If the temperature inside the car rises
to 43C, what is the volume of the chip bag? If the maximum volume of the bag is 45mL,
will the bag explode?
23) A 25mL gas at STP and is compressed to 0.15atm with a volume of 46mL. What is
the final temperature? (STP = 1 atm, 273K)
24) Ca + H2O  CaO + H2
Element oxidized: ____________________________________
Element reduced: ____________________________________