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CHEM 1201- Midterm Exam Guide - Comprehensive Notes for the exam ( 13 pages long!)


Department
Chemistry
Course Code
CHEM 1201
Professor
irina Nesterova
Study Guide
Midterm

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LSU
CHEM 1201
MIDTERM EXAM
STUDY GUIDE

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Coprehesie HW Ch. 4-6 Asers
1. When aqueous solutions of ________ are mixed, a precipitate forms.
a. NaI and KBr
b. KOH and Ba(NO3)2
c. Li2CO3 and CsI
d. NiBr2 and AgNO3
e. K2SO4 and CrCl3
2. The net ionic equation for the reaction between aqueous solutions of HF and KOH is ________.
a. HF + K+ + OH- H2O + KF
b. H+ + F- + K+ + OH- H2O + K+ + F-
c. H+ + OH- H2O
d. HF + OH- H2O + F-
e. HF + KOH H2O + K+ + F-
3. Which of the following are strong acids?
HI
HNO3
HF
HBr
a. HI, HF, HBr
b. HI, HNO3, HF, HBr
c. HNO3, HF, HBr
d. HF, HBr
e. HI, HNO3, HBr
4. Which solution contains the largest number of moles of chloride ions?
a. 4.00 mL of 1.000 M NaCl
b. 25.00 mL of 0.400 M KCl
c. 7.50 mL of 0.500 M FeCl3
d. 10.0 mL of 0.500 M BaCl2
e. 30.00 mL of 0.100 M CaCl2
5. Which one of the following is not true concerning 2.00 L of 0.100 M solution of Ca3(PO4)2?
a. 1.00 L of this solution is required to furnish 0.300 mol of Ca2+ ions.
b. This solution contains 0.600 mol of Ca2+.
c. This solution contains 0.800 mol of oxygen atoms.
d. There are 6.02 × 1022 phosphorus atoms in 500.0 mL of this solution.
e. This solution contains 0.200 mol of Ca3(PO4)2.
6. A 31.5 mL aliquot of H2SO4 (aq) of unknown concentration was titrated with 0.0134 M NaOH (aq).
It took 23.9 mL of the base to reach the endpoint of the titration. The concentration (M) of the acid
was ________.
a. 0.102
b. 0.227
c. 0.00508
d. 0.0102
e. 0.0204
7. A 18 mL aliquot of 0.19 MH3PO4(aq) is to be titrated with 0.26 MNaOH(aq). What volume (mL)
of base will it take to reach the equivalence point?
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a. 121
b. 39.5
c. 13.2
d. 4.38
e. 267
8. Which combination will produce a precipitate?
a. AgNO3 (aq) and Ca(C2H3O2)2 (aq)
b. KOH (aq) and Mg(NO3)2 (aq)
c. NaC2H3O2 (aq) and HCl (aq)
d. NaOH (aq) and HCl (aq)
e. NaF (aq) and HCl (aq)
9. Which combination will produce a precipitate?
a. NH4OH (aq) and HCl (aq)
b. NaOH (aq) and Fe(NO3)2 (aq)
c. AgNO3 (aq) and Ca(C2H3O2)2 (aq)
d. NaCl (aq) and HC2H3O2 (aq)
e. NaOH (aq) and HCl (aq)
10. The kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is ________ J.
a. 113000
b. 145
c. 1450
d. 0.950
e. 113
11. The value of ΔH° for the reaction below is -72 kJ. ________ kJ of heat are released when 80.9
grams of HBr is formed in this reaction.
H2 (g) + Br2 (g) 2HBr (g)
a. 144
b. 72
c. -72
d. 36
e. 0.44
12. Which one of the following represents an impossible set of quantum numbers for an electron in
an atom? (arranged as n, l, m l , and ms)
a. 4, 3, 0, 0
b. 4, 3, 3, - ½
c. 4, 3, 0, + ½
d. 4, 3, -3, ½
e. 4, -2, -2, - ½
13. All of the orbitals in a given subshell have the same value as the ________ quantum number.
a. Principal
b. Angular momentum
c. Magnetic
d. A and B
e. B and C
14. The total number of orbitals in a shell is given by ________.
a. n2
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