Review Sheet Exam 2
3.4-4.7
Supplemental Instruction
Iowa State University
Leader:
Course:
Instructor:
Date:
Hannah
Chem 163
Bonaccorsi
March 1, 2009
1. How many moles are present in 8.0 grams of PCl3?
a. How many grams of water react with the amount of PCl3 found in the first
partaccording to the following chemical equation?
PCl3 + 3H2OH3PO3+ 3HCl
2.
How many grams of aspirin would you obtain from 4.5grams of salicylic acid with a
percent yield of 75%?
C7H6O3+ C4H6O3C9H8O4+C2H4O2
Salicylic acetic
aspirin acetic
Acid
acid
acid
3. True/False The excess reactant determines the extent that the chemical reaction takes
place.
4. What is the limiting reactant if 3.2mol O2 and 6.7 mol of H2 are reacted to make water?
2H2 + O2 2H2O
a. What is the percent yield of 93.7 grams of H2O are recovered in the lab?
5. True/False The theoretical yield is always greater than the actual yield.
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6. What is the concentration of 16.8 grams of NaOH in 2500mL?
7. True/False When diluting a solution the number of moles changes.
8. What are the 2 components and a solution?
9. How many moles K2Cr2O7 is present in 250mL of 0.025M solution?
a. What is the concentration of K+ ions in this soultion?
10. What is the final concentration if 25mL of 12.0M is diluted to 500mL?
11. If I prepared a solution by dissolving 56.8g NaOH into 150mL what would the molarity
be?
12. Barium Chloride will react with sodium phosphate, predict the products of this reaction
(HINT MAKE SURE IT IS BALANCED!)
3BaCl2+2Na3PO4 ?
a. How many mL of 0.025M Barium chloride are needed to react with 50mL of
0.015M sodium phosphate?
13. A student finds that 38.4 mL of 0.215M HCl (aq) is required to neutralize a 20.0mL
sample of Ba(OH)2, What is the molarity of the Barium hydroxide?
2HCL(aq)+ Ba(OH)2(aq)BaCl2(aq)+H2O(l)
14. List the three types of reactions named in class and specify how they are different and
what makes each unique.
15. Which one of the following is NOT a strong electrolyte?
a. NaOH
b. HBr
c. KF
d. HF
16. Which of the following is a weak electrolyte, circle all that apply.
a. C2H6
b. CH3OH
c. NH3
d. HNO3
e. CH3CO2H
17. Label the following with Strong, Weak, or Non- electrolyte.
a. KOH
b. H2SO4
c. C6H12O6(glucose-sugar)
d. CaCO3
e. NaCl
f. C3H8
g. HF
h. H2CO3(Carbonic Acid)
19. What is the concentration H+ ions in 0.986M H3PO4?
20. Circle the following reactions that ARE NOT Redox reactions.
a. 2 Mg(s) + O2(g)
2 MgO(s)
b. Cu(s) + 2 Ag+(aq)
Cu2+(aq) + 2 Ag(s)
c. CO2(g) + H2(g) CO(g) + H2O(g)
d. 2NaOH + H2SO4 → 2 H2O + Na2SO4
e. Ba(NO3)2 + CuSO4
BaSO4(s) + Cu(NO3)2
f. 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g)
g. Fe (s) + CuSO4 (aq) → Cu (s) + FeSO4 (aq)
h. Na (g) + KCl (l) → K (g) + NaCl (l)
21. Predict product of the following reaction:
a. HNO3(aq) +KOH(aq)?
22. Predict if the following compounds will be soluble or insoluble.
a. NiCl2
b. Ag2S
c. Cs3PO4
d. SrCO3
e. PbSO4
23. When K2SO4(aq) and Pb(NO3)2(aq) are mixed, a white-colored precipitate forms:
a) KNO3
b) K2SO4
c) Pb
d) PbSO4
e) K3N
24. What is the net ionic equation for most acid/base neutralization reactions?
a) Na+(aq) + Cl–(aq) --> NaCl(aq)
b) Na+(aq) + Cl–(aq) -->NaCl(s)
c) H+(aq) + OH–(aq) --> H2O(l)
25. Predict the products of the following equation, and write the net ionic equation and name the
spectator ion(s).
a. Pb(NO3)2(aq) + K2SO4(aq) →
26. In the following reaction label what is being oxidized and reduced, oxidizing agent
and reducing agent, and the reductant and the oxidant.
a. Ca(s)+ 2H+(aq)Ca2+(aq)+ H2(g)
b. Mg(s)+CoSO4(aq)MgSO4(aq)+Co(s)
27. Determine the oxidation states of each element of the following.
a. Na3PO4 Na__________ P_____________O__________
b. Ca (s) ___________
c. NiH2 Ni________ H______
d. (HSO4)- H_______ S________ O_________
e. I2_________
f. (HC2O4)- H_________ C_________ O________
Be sure to know:
Strong Acids/Bases
Exceptions to Hydrogens oxidation states (Hydrides, NH3)
NH3 is a WEAK BASE
Acetic Acid and HF are weak acids
Diatomic Molecules (H2, N2, O2, F2, Cl2, Br2, I2)
List of Ions
MC which one is redox reaction