Chemistry Reference
In-Depth Information
General Problems
8.72
Explain the difference among the following questions:
What is the product of the electrolysis of water contain-
ing dilute NaCl to carry the current?
What is the product of the electrolysis of water contain-
ing dilute NaCl?
What is the product of the electrolysis of dilute aqueous
NaCl?
8.73 Consider the following pairs of reactants. For each,
determine the possible reaction type, and write correct
formulas for the products that could be produced. If the
reaction can proceed, write a balanced equation.
(a) CO(g) and
(b) HCl(aq) and Al(s)
(c)
8.83 Complete and balance each of the following equations:
(a)
(b)
(c)
C
5
H
10
O
2
(
/
)
O
2
(g, excess) £
C
3
H
8
(g)
O
2
(g, excess) £
C
12
H
26
(
/
)
O
2
(g, limited) £
Kerosene
(d)
C
12
H
26
(
/
)
O
2
(g, excess) £
Kerosene
8.84
Explain why the Solvay process is used instead of the
following reaction:
CaCO
3
2 NaCl £ CaCl
2
Na
2
CO
3
O
2
(g)
8.85 Complete and balance each of the following equations:
(a)
(b)
CrCl
2
(aq)
AgNO
3
(aq) £
KNO
3
(aq)
and AgCl(s)
CrCl
3
(aq)
AgNO
3
(aq) £
8.74 Give one example of each type of reaction in Problem 8.1.
8.75 (a) Which class of reaction requires only one reactant?
(b) Does the addition of a catalyst change the answer to
part (a)?
(c) How can we recognize a substance as a catalyst?
8.76
Is each of the following equations balanced? Is each
correct?
(a)
(b)
(c)
8.77 What is unusual about the following decomposition
reactions?
8.86 Inexpensive metal forks corrode rapidly if used in a del-
icatessen to remove pickles from the juice in which they
are shipped. Explain the probable cause.
8.87 Assuming that water containing deposits
1 mg of per minute on the ceiling of a limestone
cavern, how long will it take to produce a stalactite with
a mass of 75 metric tons
Ca(HCO
3
)
2
CaCO
3
10
6
g)?
(1 metric ton
1
AgCl(s)
HNO
3
(aq) £ HCl(aq)
AgNO
3
(aq)
8.88 What products are expected from the reaction of ammo-
nium chloride and potassium hydroxide? Write an equa-
tion for the reaction.
ZnCl
2
(aq)
Fe(s) £ FeCl
2
(aq)
Zn(s)
KCl(aq)
NaNO
3
(aq) £ NaCl(aq)
KNO
3
(aq)
8.89 Complete and balance each of the following equations:
(a)
(b)
(c)
CrBr
3
(s)
Cl
2
(g) £
CrCl
2
(s)
Cl
2
(g) £
Heat
Heat
(a) NH
4
HCO
3
(s)
⎯→
(b) Ca(HCO
3
)
2
(s)
⎯→
CrBr
2
(s)
Cl
2
(g, excess)
8.78 Complete and balance each of the following equations:
(a)
(b)
(c)
(d)
8.79
Balance the following equation:
8.90 Balance the following equation:
HCl(aq)
NaHCO
3
(aq) £
NaI(aq)
Cr(NO
3
)
3
(aq) £
NaOH(aq)
NaHSO
3
(aq) £
CrI
2
(aq)
NaNO
3
(aq)
I
2
(aq)
HNO
3
(aq)
Ba(OH)
2
(aq) £
8.91 A certain double substitution reaction produced sodium
sulfate, carbon dioxide, and water. Write four balanced
chemical equations that could have occurred.
KF(aq)
HCl(aq) £
Cu(NO
3
)
2
(aq)
KI(aq) £
8.92
Balance the equation for each of the following reactions:
(a) Lithium metal plus oxygen produces lithium oxide.
(b) Sodium metal plus oxygen gas produces sodium
peroxide.
(c) Potassium metal plus oxygen produces potassium
superoxide.
I
2
(aq)
KNO
3
(aq)
CuI(s)
8.80
How can we distinguish a combustion reaction from a
displacement reaction, considering that each may in-
volve an element and a compound?
8.81
Addition of aqueous ammonia to a solution of
causes a white solid to form. What
is the formula of the solid? Write an equation for the
reaction.
Ca(HCO
3
)
2
(aq)
8.93 A student bubbled an excess of fluorine gas into aque-
ous sodium iodide, producing sodium fluoride and
sodium periodate. What additional products did she
obtain?
8.82 Neither nor CO reacts with water under normal
conditions. What is unusual about that lack of reactivity?
N
2
O
