Download D) CH 3

Revesion: Chapters 14, 15, 24,
25
‫ ليلى الحربي‬.‫ د‬/‫إعداد‬
Chapter 14
Chemical Equilibrium
A large value of the equilibrium
constant indicates that when the
reaction reaches equilibrium,
mostly ______ will be present.
a.
b.
c.
d.
reactants
products
catalysts
shrapnel
When equilibrium is achieved:
a.
b.
c.
d.
Q>K
Q<K
Q=K
Q2 = K
CO2 + H2  CO + H2O
If all species are gases and H2 is added, the
amount of CO present at equilibrium will:
a.
b.
c.
d.
increase.
decrease.
remain unchanged.
disappear.
CO2 + H2  CO + H2O
If all species are gases and H2O is added,
the amount of CO present at equilibrium
will:
a.
b.
c.
d.
increase.
decrease.
remain unchanged.
disappear.
CO2 + H2  CO + H2O
If the reaction is endothermic and the
temperature is raised, the amount of
CO present will:
a.
b.
c.
d.
increase.
decrease.
remain unchanged.
disappear.
CO2 + H2  CO + H2O
If all species are gases and the container is
compressed, the amount of CO present
will:
a.
b.
c.
d.
increase.
decrease.
remain unchanged.
disappear.
CO2 + H2  CO + H2O
If a catalyst is added to the
equilibrium, the amount of CO
present will:
a.
b.
c.
d.
increase.
decrease.
remain unchanged.
disappear.
What is Kp in terms of Kc for
the following reaction ?
2 NO(g) +
•
•
•
•
•
O2(g)
Kp = KcRT
Kp = Kc/RT
Kp = KcR/T
Kp = Kc
Kp = Kc/(RT) 2
2 NO2(g)
Kp = Kc (RT)∆n
∆n = 2-3 =-1
Kp = Kc /(RT)
What is the correct equilibrium
constant expression for the reaction:
P4(s)
+
6 Cl2(g)
4 PCl3(l)
Which accurately reflects the changes in concentration that
will occur if O2 is added to disturb the equilibrium?
2 NO(g)
+
O2(g)
2 NO2(g)
[NO]
[O2]
[NO]
1.
Increase
Increase
Increase
2.
Increase
Increase
Decrease
3.
Decrease
Decrease
Decrease
4.
Decrease
Decrease
Increase
5.
Decrease
Increase
Increase
Which of the following will result in an
equilibrium shift to the right?
PCl3(g) + Cl2(g)
•
•
•
•
•
PCl5(g)
DH° = –87.9 kJ/mol
Increase temperature/increase volume
Increase temperature/decrease volume
Decrease temperature/increase volume
Decrease temperature/decrease volume
None of the above
PCl5
• Consider the reversible reaction at equilibrium at
392oC:
2A(g) + B(g) ⇄ C(g)
• The partial pressures are found to be: A: 6.70 atm, B:
10.1 atm, C: 3.60 atm. Evaluate Kp for this reaction.
• (a) 7.94 x 10-3
•
•
•
•
(b) 0.146
(c) 0.0532
(d) 54.5
(e) 121
The equation relating Kp
and Kc is
Kp will be equal to Kc if
A) Kp = Kc (RT)∆n
A) ∆ n = 1
B) Kp = Kc RT∆n
B) ∆ n = 0
C) Kc = Kp RT ∆ n
C) RT = 0
D) Kc = Kp (RT) ∆n
D) ∆ n = -1
Dr.Liala AL-Harbi
Chapter 15
Acid-Base Equilibria
What is the pH of
0.0200 M aqueous
solution of HBr ?
a. 1.00
b. 1.70
c. 2.30
d. 12.30
• The pOH of a solution
of NaOH is 11.30.
What is the [H+] for
this solution?
• (a) 2.0 x 10-3
• (b) 2.5 x 10-3
• (c) 5.0 x 10-12
• (d) 4.0 x 10-12
• (e) 6.2 x 10-8
What is the pH of a
0.0400 M aqueous
solution of KOH ?
a.
b.
c.
d.
12.60
10.30
4.00
1.40
• What is the
approximate pH of a
solution labeled 6 x
10-5 M HBr?
•
•
•
•
•
(a) 4.2
(b) 4.5
(c) 5.8
(d) 9.8
(e) 8.2
Dr.Liala AL-Harbi
If the pH = 2 for an HNO3
solution, what is the
concentration of HNO3?
•
•
•
•
•
0.10
0.20
0.010
0.020
0.0010
• A solution in which
[H+] = 10-8 M has a
pH of ___ and is ___.
• (a) 8, acidic
• (b) 6, basic
• (c) -6, basic
• (d) -8, neutral
• (e) 8, basic
Dr.Liala AL-Harbi
• Which of the following
solutions has the lowest
pH at 25oC? (No
calculations required.)
• (a) 0.2 M NaOH
• (b) 0.2 M NH3
• (c) 0.2 M HCl
• (d) pure water
• What is the pH of a
0.010 M HF solution?
• <1
• 1
• 2
• >2
• 7
Dr.Liala AL-Harbi
• Calculate the pH of a•
3.5 × 10-3 M HNO3
solution.
•
• A. -2.46
•
• B. 0.54
•
• C. 2.46
•
• D. 3.00
•
• E. 3.46
Calculate the pH of 2.6 ×
10-2 M KOH.
A. 12.41
B. 15.59
C. 2.06
D. 7.00
E. 1.59
Dr.Liala AL-Harbi
• What is the
in
a 4.8 × 10-2 M KOH
solution?
[H+]ion
a)
b)
c)
d)
e)
4.8 ×
M
1.0 × 10-7 M
4.8 × 10-11 M
4.8 × 10-12 M
2.1 × 10-13 M
10-2
• What is the [OH-] ion
in a 5.2 × 10-4 M
HNO3 solution?
a)
b)
c)
d)
e)
1.9 × 10-11 M
1.0 × 10-7 M
5.2 × 10-4 M
zero
1.0 × 10-4 M
Dr.Liala AL-Harbi
Chapter 25
The Chemistry of Life: Organic and
Biological Chemistry
C10H22 is the
formula of an:
a.
b.
c.
d.
alkane.
alkene.
alkyne.
aromatic
hydrocarbon.
• A molecule with the
formula C3H8 is a(n):
• (a) hexane
• (b) propane
• (c) decane
• (d) butane
• (e) ethane
Which compound below
does not havegeometric
isomers (cis-trans
isomers)?
a. 1-butene
b. 2-butene
c. 2-pentene
d. 3-hexene
CH3–CH2–CH2–CH=CH2
The correct name for the
compound above is:
a.
b.
c.
d.
4-propene.
1-propene.
4-pentene.
1-pentene.
The product of the reaction of
HBr with 2-butene is named:
a.
b.
c.
d.
1-bromobutane.
2-bromobutane.
1,2-dibromobutane.
2,3-dibromobutane.
Select the correct IUPAC name
for
•
•
•
•
•
a) 1,1,3-trimethylpentane
(b) 1-ethyl-1,3-dimethylbutane
(c) 2,4-dimethylhexane
(d) 3,5-dimethylhexane
(e) 3,5,5-trimethylpentane
Which functional group
contains a carbonyl
(C=O) group?
a.
b.
c.
d.
alcohol
ether
carboxylic acid
alkene
• The functional group
given below is
characteristic of
organic _____
(a) ketones
(b) acids
(c) aldehydes
(d) esters
(e) alcohols
How many structural
isomers does pentane
(C5H12) have?
1.
2.
3.
4.
5.
1
2
3
4
5
• Which of the following
hydrocarbons does
not have isomers?
•
•
•
•
•
(a) C7H16
(b) C6H14
(c) C5H10
(d) C4H8
(e) C3H8
• Which of the following
will undergo an
addition reaction with
chlorine?
(a) CH3CH2CH2CH3
(b) CH3CH2CH=CHCH3
(c) C6H6
(d) CH3CH2COOH
(e) CH3CH2OH
Select the correct IUPAC name
for
a) 1,1,3-trimethylpentane
(b) 1-ethyl-1,3-dimethylbutane
(c) 2,4-dimethylhexane
(d) 3,5-dimethylhexane
(e) 3,5,5-trimethylpentane
Dr.Liala AL-Harbi
• Which of the following
is the product resulting
from addition of HCl to
CH3-CH=CH2?
• Which of the following
is a ketone?
A) CH3Cl + CH2=CH2
B) CH3-CHCl=CH2
C) CH3-CH2-CH2Cl
D) CH3-CHCl-CH3
E) HCl does not add to
alkanes.
B) CH3CH2CHO
A) CH3CH2COCH3
C) CH3OCH3
D) CH3CH2COOH
E) H2C=C=CH2
• Which of the
following is a
CH3CH2CH2CH2CH 2CH2CH2 OH
ketone?
represents:
The formula
A) an alcohol
B) an alkene
C) an alkyne
D) an unsaturated hydrocarbon
Dr.Liala AL-Harbi
A) CH3CH2COCH3
B) CH3CH2CHO
C) CH3OCH3
D) CH3CH2COOH
E) H2C=C=CH2
• Which type of
functional group does
not include a carbonyl
group in its structure?
A) carboxylic acid
B) ether
C) ketone
D) aldehyde
E) ester
• Vanillin is used as a
flavoring agent. Identify
the functional group
circled.
A) aldehyde
B) ketone
C) carboxylic acid
D) Alcohol
Dr.Liala AL-Harbi
• An alkane with seven
carbon atoms in a
linear configuration is
called a
•
•
•
•
•
A) hexene
B) heptene
C) hepylane
D) heptane
E) hexane
A protein is:
A) a polymer of amino
acids
B) a fatty acid ester of
glycerol
C) a polysaccharide
D) an addition polymer
E) a polymer of fatty acids