Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Question 10. THIS IS NOT FOR A GRADE!
**It's a practice exam with the answer posted with it!**
I just need help with the concept please explain
![6. The following equilibrium is established in a sealed container. Which of the following changes would increase
the partial pressure of SO-ig) at equilibrium?
SO₂Cl₂(g) SO₂(g) + Cl:(g)
a. Adding an inert gas (such as helium).
b. Increasing the temperature.
c. Removing SO.Cl:(g).
d. Adding Cla(g).
e. Decreasing the volume of the reaction vessel.
7. Which of the following is not a conjugate acid-base pair?
a. HF, H™
8. Which of the following pairs lists the weaker acid first?
a. HCl, HCIO
b. HCN, CN c. H₂SO₂ HSO d. H.POHPO HCL, CI
AH = +67
9. What is the pH of a solution with [OH] = 1.8x107
a. 4.75
b. 9.25
c. 7.00
b. HBrO₂, HBrO, c. H₂O, NaOH d. HCIO), HBrO, e. HBr, HI
10. What is the pll of a solution that is 0.40 M in HCN?
a. 0.40
C. 9.80
b. 9.40
kJ
mol
d. 4.76
e. 8.25
The K, for HCN is 4.0x10-10
d. 4.90
e. 9.10
11. A 0.64 M solution of the weak basc hydrazine (N-H) is found to be 0.16% ionized at equilibrium. What is the
value of K, for hydrazine?
a. 1.0x10³
b. 1.6x10
c. 5.77
d. 6.7x10-¹
e. 1.0x102
12. Which of the following substances produces a basic solution when dissolved in water?
a. CaBr
b. NH1
c. LICI
d. Co(NO)
e. NaCN
13. A sample of 0.050 mol of NaOH is added to a solution containing 0.100 mol of acetic acid (K,= 1.8x10³). After
mixing, is the solution a buffer?
a. Yes, because the solution contains a weak acid and its conjugate base.
b. Yes, because the solution contains acetate ions and hydroxide ions.
c. No, because the solution contains acetate ions and hydroxide ions.
d. No, because we don't know the volume.
e. No, because we have too much acid.
14. A sample of 0.45 mol of the weak acid HCIO (pK, = 7.54) and 0.15 mol of NaClO are dissolved in enough water to
make 0.750 L of solution. What is the pH of the solution?
a. 7.06
b. 8.02
c. 3.88
d. 10.42
e. 0.398
15. When 15.0 mL of a 0.20 M HCI solution is mixed with 20.0 mL of 0.15 M NaOH solution, what is the pH of the
resulting solution?
a. 7.00
b. 1.06
c. 12.93
d. 6.93
e. 7.25](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F43965b80-42e8-41df-9b51-2c2200725cfe%2F4b67df1f-5f9f-4b16-8471-87676487a9a9%2F6027sfs_processed.jpeg&w=3840&q=75)
Transcribed Image Text:6. The following equilibrium is established in a sealed container. Which of the following changes would increase
the partial pressure of SO-ig) at equilibrium?
SO₂Cl₂(g) SO₂(g) + Cl:(g)
a. Adding an inert gas (such as helium).
b. Increasing the temperature.
c. Removing SO.Cl:(g).
d. Adding Cla(g).
e. Decreasing the volume of the reaction vessel.
7. Which of the following is not a conjugate acid-base pair?
a. HF, H™
8. Which of the following pairs lists the weaker acid first?
a. HCl, HCIO
b. HCN, CN c. H₂SO₂ HSO d. H.POHPO HCL, CI
AH = +67
9. What is the pH of a solution with [OH] = 1.8x107
a. 4.75
b. 9.25
c. 7.00
b. HBrO₂, HBrO, c. H₂O, NaOH d. HCIO), HBrO, e. HBr, HI
10. What is the pll of a solution that is 0.40 M in HCN?
a. 0.40
C. 9.80
b. 9.40
kJ
mol
d. 4.76
e. 8.25
The K, for HCN is 4.0x10-10
d. 4.90
e. 9.10
11. A 0.64 M solution of the weak basc hydrazine (N-H) is found to be 0.16% ionized at equilibrium. What is the
value of K, for hydrazine?
a. 1.0x10³
b. 1.6x10
c. 5.77
d. 6.7x10-¹
e. 1.0x102
12. Which of the following substances produces a basic solution when dissolved in water?
a. CaBr
b. NH1
c. LICI
d. Co(NO)
e. NaCN
13. A sample of 0.050 mol of NaOH is added to a solution containing 0.100 mol of acetic acid (K,= 1.8x10³). After
mixing, is the solution a buffer?
a. Yes, because the solution contains a weak acid and its conjugate base.
b. Yes, because the solution contains acetate ions and hydroxide ions.
c. No, because the solution contains acetate ions and hydroxide ions.
d. No, because we don't know the volume.
e. No, because we have too much acid.
14. A sample of 0.45 mol of the weak acid HCIO (pK, = 7.54) and 0.15 mol of NaClO are dissolved in enough water to
make 0.750 L of solution. What is the pH of the solution?
a. 7.06
b. 8.02
c. 3.88
d. 10.42
e. 0.398
15. When 15.0 mL of a 0.20 M HCI solution is mixed with 20.0 mL of 0.15 M NaOH solution, what is the pH of the
resulting solution?
a. 7.00
b. 1.06
c. 12.93
d. 6.93
e. 7.25
Transcribed Image Text:Tl
th
Answer Section
MULTIPLE CHOICE
1. ANS: E
2.
ANS: E
3.
ANS: B
ANS: A
ANS: D
4.
5.
6. ANS: B
7. ANS: A
8.
ANS: E
9.
ANS: B
10. ANS: D
11. ANS: B
12. ANS: E
13. ANS: A
14. ANS: A
15. ANS: A
16. ANS: D
17. ANS: A
18. ANS: E
19. ANS: B
20. ANS: B
21. ANS: A
22. ANS: C
23. ANS: C
24. ANS: C
25. ANS: C
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