Sample Quiz 4
Duration of exam: 30 minutes
Multiple Choice Questions: 10
1. What is the complete ionic equation for the following molecular equation?
2. Select the precipitation reaction from the following reactions:
a. KNO3(aq) + CsCl(aq) CsNO3(aq) + KCl(aq)
b. Ca(s) + O2(g) CaO(s)
c. NaHCO3(s) Na2CO3(s) + H2O(l) + CO2(g)
d. Na2CO3(aq) + BaCl2(aq) BaCO3(s) + NaCl(aq)
e. HCl(aq) + NaOH(aq) NaCl(aq) + H2O(l)
3. Identify the species being reduced in the following reaction:
Cr + Sn4+ Cr4+ + Sn
a. Cr
b. Sn4+
c. Cr4+
d. Sn
e. None of the above
4. Example of a strong electrolyte is
a. HF
b. CO2
c. H3PO4
d. NH3
e. NaCl
5. Which of the following reactions is a decomposition reaction?
a. AgNO3(aq) + HCl(aq) AgCl(s) + HNO3(aq)
b. Na2O(s) + CO2(g) Na2CO3(s)
c. C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(l)
d. 2H2O(l) 2H2(g) + O2(g)
e. KOH(aq) + HCl(aq) KCl(aq) + H2O(l)
6. Choose the insoluble salt among the following:
a. FeCl3
b. Na3PO4
c. CaCO3
d. Rb2CO3
e. AgNO3
7. What is the salt formed when RbOH reacts with H2SO4?
a. RbSO4
b. Rb2SO4
c. RbS
d. Rb(SO4)2
e. RbH
8. The spectator ion(s) in the following reaction is/are (3 pts)
Na2CO3(aq) + Ba(NO3)2(aq) BaCO3(s) + 2NaNO3(aq)
Na+ and Ba2+
Ba2+ and CO32-
CO32- and NO3-
Na+ only
Na+ and NO3-
9. If Hg2+ Hg and Al Al3+ are the unbalanced half reactions, what is the corresponding balanced redox reaction?
a. Hg2+ + Al Hg + Al3+
b. Hg2+ + Al Hg + Al3+ + e-
c. 3Hg2+ + Al + 3e- 3Hg + Al3+
d. 3Hg2+ + 2Al 3Hg + 2Al3+
e. None of the above choices are correct
10. Which of the following is a combustion reaction?
a. Na (s)+ O2 (g) + heat Na2O (s)
b. N2 (g) + H2(g) NH3(g)
c. H2O(s) + heat H2O(g)
d. CH4(g) + Cl2(g) CH3Cl + HCl
e. CO2 (g) + heat C(s) + O2(g)
Polyatomic Ions List
Solubility Chart
Salts containing the following ions
Solubility
Exceptions
Nitrates, NO3-
Always soluble
None
Acetate, CH3COO-
Always soluble
None
Group I metal ions (Li+, Na+, K+, Cs+, Rb+)
Always soluble
None
Ammonium, NH4+
Always soluble
None
Halides, Cl-, F-, Br-, I-
Usually soluble
Insoluble if present with Ag+, Pb2+, Hg22+ ions
Sulfates, SO42-
Usually soluble
Insoluble if present with Ca2+, Sr2+, Ba2+,
Pb2+,Hg22+ ions
Carbonates and Phosphates, CO32- and PO43-
Usually insoluble
Soluble if present with Gp IA and NH4+ ions
Hydroxides, OH-
Usually insoluble
Completely Soluble if present with Gp 1A,
NH4+ ions and slightly soluble if present with Ca2+, Sr2+, Ba2+ ions
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