11. A 0.64 M solution of the weak hase hydrazine (NH) is found to be 0.16% ionized at equilibrium. What is the value of K for hydrazine? a. 1.0x10 d. 6.7x10 10x10¹ b. 1.6x10 c. 5.77 e
11. A 0.64 M solution of the weak hase hydrazine (NH) is found to be 0.16% ionized at equilibrium. What is the value of K for hydrazine? a. 1.0x10 d. 6.7x10 10x10¹ b. 1.6x10 c. 5.77 e
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Chapter12: Chemical Equilibrium
Section: Chapter Questions
Problem 12.45PAE: The following equilibrium is established in a closed container: C(s)+O2(g)CO2(g)H=393kJmol1 How does...
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Question
Question 11. 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:(g) at equilibrium?
SO,Cl₂(g) SO₂(g) + Cl₂(g)
Adding an inert gas (such as helium).
a.
b. Increasing the temperature.
C. Removing SOCI(g)
d. Adding Cl(g).
C. Decreasing the volume of the reaction vessel.
7. Which of the following is not a conjugate acid-base pair?
a. HF. II
b. HCN, CN
9. What is the pH of a solution with [OH]- 1.8x10¹?
a. 4.75
b. 9.25
c. 7.00
AH +67
c. H₂SO, HSO d. H.PO. HPO e HCL CI
8. Which of the following pairs lists the weaker acid first?
a. HCL, HCIO b. IIBRO, HBrO; c. H₂O, NaOH d. HCIO, HBO, e. HBr. HI
10. What is the pH of a solution that is 0.40 M in HCN?
b. 9.40
a. 0.40
c. 9.80
kJ
mol
d. 4.76
e. 8.25
The K, for HCN is 4.0x10".
d. 4.90
e. 9.10
11. A 0.64 M solution of the weak base hydrazine (NH₂) is found to be 0.16% ionized at equilibrium. What is the
value of K for hydrazine?
a. 1.0x10
b. 1.6x10
d. 6.7x10
b. 1.06
c. 5.77
e. 1.0x10¹¹
12. Which of the following substances produces a basic solution when dissolved in water?
a. CaBrz
d. Co(NO): e. NaCN
b. NHƯ
LICI
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
C.
e. 0.398
d. 10.42
15. When 15.0 mL of a 0.20 M HCl solution is mixed with 20.0 mL of 0.15 M NaOH solution, what is the pH of the
resulting solution?
a. 7.00
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%2F3bd1b3cb-e1f9-46d8-8820-8895c30682b5%2F0395w1b_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:(g) at equilibrium?
SO,Cl₂(g) SO₂(g) + Cl₂(g)
Adding an inert gas (such as helium).
a.
b. Increasing the temperature.
C. Removing SOCI(g)
d. Adding Cl(g).
C. Decreasing the volume of the reaction vessel.
7. Which of the following is not a conjugate acid-base pair?
a. HF. II
b. HCN, CN
9. What is the pH of a solution with [OH]- 1.8x10¹?
a. 4.75
b. 9.25
c. 7.00
AH +67
c. H₂SO, HSO d. H.PO. HPO e HCL CI
8. Which of the following pairs lists the weaker acid first?
a. HCL, HCIO b. IIBRO, HBrO; c. H₂O, NaOH d. HCIO, HBO, e. HBr. HI
10. What is the pH of a solution that is 0.40 M in HCN?
b. 9.40
a. 0.40
c. 9.80
kJ
mol
d. 4.76
e. 8.25
The K, for HCN is 4.0x10".
d. 4.90
e. 9.10
11. A 0.64 M solution of the weak base hydrazine (NH₂) is found to be 0.16% ionized at equilibrium. What is the
value of K for hydrazine?
a. 1.0x10
b. 1.6x10
d. 6.7x10
b. 1.06
c. 5.77
e. 1.0x10¹¹
12. Which of the following substances produces a basic solution when dissolved in water?
a. CaBrz
d. Co(NO): e. NaCN
b. NHƯ
LICI
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
C.
e. 0.398
d. 10.42
15. When 15.0 mL of a 0.20 M HCl solution is mixed with 20.0 mL of 0.15 M NaOH solution, what is the pH of the
resulting solution?
a. 7.00
C. 12.93
d. 6.93
e. 7.25
Transcribed Image Text:Answer Section
MULTIPLE CHOICE
1.
ANS: E
2.
ANS: E
3.
ANS: B
4.
ANS: A
5.
ANS: D
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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