Answer & Explanation:Question 1
Identify the spectator ions in
the reaction Ca(NO3)2 + 2NaCl(aq) ? CaCl2(aq) + 2NaNO3(aq)
Select one:
a.Na+, NO3-
b. Ca+2, NO3-
c. Na+, Cl-
d. Ca+2, Cl-
e. Na+, Cl-, Ca+2,
NO3-
Question 2
What is the oxidation number
of N in NH4+
Select one:
a. 4
b. -3
c. -4
d. 1
e. +3
Question 3
What are the spectator ions in
the reaction HF(aq) + NaOH(aq) ?
NaF(aq) + H2O(l)
Select one:
a. H+, F-
b. Na+, OH-
c. Na+, F-
d. Na+ alone
e. H+, OH-
Question 4
What is the oxidation number
of S in S2O3-2?
Select one:
a. -3
b. 2
c. 3
d. 4
e. -2
Question 5
Identify the oxidizing agent
in the reaction: Cl2 + 2Br- ? 2Cl- + Br2
Select one:
a. Br-
b. Cl2
c. Br2
d. Cl-
Question 6
What is the molarity of the
solution formed by dissolving 10.0g of Ca(NO3)2 in 250
mL aqueous solution?
Question 7
Consider the reaction H2SO4(aq)
+ 2NaOH(aq) ? 2H2O(l) +Na2SO4(aq).
If 25 mL of H2SO4 was needed to react with 15 mL of
0.20 M NaOH, what is the molarity of the H2SO4(aq)?
Question 8
Which of the following is a
weak electrolyte?
Select one:
a. HF(aq)
b. NH4Cl(aq)
c. CaCl2(aq)
d. CH3OH(aq)
e. HCl(aq)
Question 9
Identify the reducing agent in
the reaction Ca + 2H+?
Ca+2 + H2
Select one:
a. H2
b. Ca
c. Ca+2
d. H+
Question 10
C
hromium is less active than
Manganese but more active than Cobalt. Which of the following reactions will
occur?
Select one:
a. Co + Cr+3 ? Co+2 +
Cr
b. Mn + Cr+3 ? Mn+2 +
Cr
c. Co+2 + Cr+3 ? Co+
Cr
d. Co + Cr ? Co+2 +
Cr+3
e. Mn + Cr ? Mn+2 +
Cr+3
Question 11
Which of the following is a
strong electrolyte?
Select one:
a. HCl(aq)
b. NH4Cl(aq)
c. CaCl2(aq)
d. All of them are
e. None of them are
Question 12
Identify the spectator ions in
the reaction: Ca(NO3)2(aq) + Na2CO3(aq)?CaCO3(s) + 2NaNO3(aq)
Select one:
a. Na+, NO3-
b. Ca+2, CO3-2
c. Ca+2, NO3-
d. All are
e. Na+, CO3-2
Question 13
Which of the following is a
nonelectrolyte
Select one:
a. CH3OH(aq)
b. CaCl2(aq)
c. NH4Cl(aq)
d. HCl(aq)
e. NH3(aq)
Question 14
Consider the reaction Mg(OH)2(s)
+ 2HCl(aq) ? MgCl2(aq)
+2H2O(l). What is the mass of Mg(OH)2(s) needed to react
with 25 ml of 0.20 M HCl(aq)?
Question 15
What is the coefficient of H2O
when the following reaction is balanced: Al(OH)3(s) + H2SO4(aq) ?Al2(SO4)3(s) +H2O(l)
Question 16
Which of the following will
dissociate completely in dilute aqueous solutions?
Select one:
a. CaCO3(s)
b. CO2(g)
c. NH4Cl(aq)
d. H2O(l)
e. HF(aq)
Question 17
Complete & Balance the
following Reaction: Fe(NO3)3(aq) + Na2S(aq) ? ? + ?