pH OF ACID AND BASE QUIZ

1. The pH of water at 298K is ….
a. equal to pOH
b. less than 7
c. greater than 7
d. equal to ½ pKw
e. less than ½ pKw
2. HCl(aq) 0,02 M 100 mL. The pH of this solution is ….
a. 2
b. 2 – log 2
c. 2 + log 2
d. 3 – log 2
e. 3 + log 2
3. If 4 g of NaOH(s) is added to water and the volume of solution is 250 mL, the pH is …. (Ar Na=23,O=16,H=1)
a. 13 – 2 log 2
b. 13 – log 2
c. 13
d. 13 + log 2
e. 13 + 2 log 2
4. HCl(aq) 0,1 M 10 mL + HCl 0,3 M 10 mL. The pH is ….
a. 1
b. 1 – log 2
c. 1 + log 2
d. 2 – log 2
e. 2
5. NaOH(aq) 0,2 M 20 mL + Ba(OH)2(aq) 0,4 M 20 mL. The pH is ….
a. 1
b. 1 – log 2
c. 1 – log 3
d. 2 – log 2
e. 2 – log 3
6. The pOH of a solution that has [H+] = 1.7 x 10-9M is ….
a. 5.22
b. 8.78
c. 4.39
d. 3.56
e. 11.64
7. A solution of 0.012 M niacin has a hydronium ion concentration of 4.1 x 10-4 M. The pH of the solution is ….
a. 4.61
b. 2.80
c. 3.39
d. 3.61
e. 4.39
8. The pH of an aqueous solution which is 0.0020 M HClO4 is ….
a. 1.30
b. 2.30
c. 2.70
d. 2.00
e. 1.70
9. The hydroxide ion concentration of the oceans is about 1.4 x 10-6. What is the pH?
a. 5.85
b. 8.85
c. 7.85
d. 7.15
e. 8.15
10. The hydroxide ion concentration of lemon juice is about 2.0 x 10-12. What is the pH?
a. 12.30
b. 1.30
c. 10.70
d. 2.70
e. 2.30
11. The pH of human muscle fluids is 6.80. The [H3O+] in muscle fluid at 25oC is ….
a. 1.6 x 10-8
b. 1.6 x 10-7
c. 1.6 x 10-6
d. 6.6 x 10-7
e. 6.6 x 10-8
12. The pH of the contents of the human stomach is about 1.0. The value of [H3O+] in the stomach at 25oC is ….
a. 1
b. 0.1
c. 1 x 10-13
d. 1 x 10-14
e. 0.01
13. The pH of a saturated solution of Mg(OH)2 is 10.50. The molarity of the magnesium ion is ….
a. 5.0 x 10-10
b. 3.2 x 10-4
c. 1.6 x 10-3
d. 3.2 x 10-3
e. 1.6 x 10-4
14. A solution of morphine (a narcotic) has a pH of 9.61. The [OH-] is ….
a. 4.1 x 10-6
b. 2.4 x 10-11
c. 4.1 x 10-4
d. 2.4 x 10-10
e. 4.1 x 10-5
15. The pOH of a 0.001 M solution of ammonia is _____ the pOH of a 0.001 M solution of potassium hydroxide.
a. less than
b. greater than
c. the same as
d. equal to
16. The pOH of an NH3 solution is ….
a. equal to 7
b. greater than 7
c. less than 7
d. around 7
e. far to 7
17. If the pH of a solution is equal to 11, the solution is ….
a. amphoteric
b. neutral
c. acidic
d. basic
18. As the [H+] increases ….
a. the pH decreases
b. the pH increases
c. the [OH-] decreases
d. the [OH-] increases
19. A solution whose pH is equal to 4.0 has a hydrogen ion concentration of ….
a. 1 x 104 M
b. 1 x 10-4 M
c. 1 x 10-10 M
d. 1 x 1010 M
20. If the pH of a solution is equal to 3, the hydroxide ion concentration is ….
a. 1 x 1011 M
b. 1 x 103 M
c. 1 x 10-3 M
d. 1 x 10-11 M
21. The pH of a solution whose hydroxide ion concentration is 0.0010 M is ….
a. 11.00
b. 9.00
c. 3.00
d. -3.00
e. -11.00
22. A solution whose pH is equal to 12 ….
a. has more hydroxide ions than hydrogen ions
b. is acidic
c. has more hydrogen ions than hydroxide ions
d. has a pOH equal to 12
23. A solution with a pH equal to 2 has a pOH equal to ….
a. 2
b. 12
c. 16
d. 4
24. The pH of a solution whose hydronium ion concentration is 1 x 10-5 M is ….
a. 5
b. 7
c. 9
d. 11
e. 13
25. A solution whose pOH is equal to 6 has a hydrogen ion concentration of ….
a. 1 x 10-5 M
b. 1 x 10-8 M
c. 1 x 10-6 M
d. 1 x 108 M
e. 1 x 109 M
26. In a particular solution, [H+] = 1.7 X 10-9M. The pH is ….
a. 23
b. 8.77
c. 4.39
d. 7.00
e. 12.64
27. A solution has [H+] = 1.54 X 10-4M. How many significant figures does the pH have?
a. 2
b. 3
c. 4
d. 1
e. 5
28. The [OH-] in a solution that has a pH of 5.40 is ….
a. 3.98 X 10-6M
b. 2.51 X 105M
c. 1.59 X 10-5M
d. 2.51 X 10-10M
e. 2.51 X 10-9M
29. A solution has [HC2H3O2] = 1.5 X 10-2M. The pH of this solution will be _____ the pH of a 1.5 X 10-2M solution of HCl.
a. greater than
b. the same as
c. less than
30. What concentration of HOCl (Ka = 3.5 x 10-8) has the same pH as that of 2.50 x 10-4 M HNO3?
a. 3,93M
b. 1,79M
c. 0,56M
d. 3,5 x 10-2
e. 6,8 x 10-8
31. What is the pH of a sample of gastric juice whose hydronium ion concentration is 4.5 x 10-2 M?
a. 2.35
b. 1.65
c. 1.15
d. 0.65
e. 1.35
32. The pH of the world's oceans is 8.15. The [H3O+] in the ocean is ….
a. 8.1 x 10-15
b. 7.1 x 10-8
c. 1.4 x 10-8
d. 1.4 x 10-9
e. 7.1 x 10-9
33. What is the pH of human muscle fluid in which the hydronium ion concentration is 1.6 x 10-7 M?
a. 7.16
b. 7.20
c. 7.80
d. 6.20
e. 6.80
34. A vinegar has a hydroxide ion concentration of 1.3 x 10-12 M. What is the pH of the vinegar?
a. 3.11
b. 3.88
c. 2.89
d. 2.11
e. 11.89
35. The hydroxide ion concentration of lemon juice is about 2.0 x 10-12. The pH is ….
a. 2.70
b. 12.30
c. 1.30
d. 2.30
e. 10.70
36. A detergent solution has a pH of 11.63. What is the [OH-]?
a. 2.3 x 10-12
b. 4.3 x 10-2
c. 4.3 x 10-3
d. 2.3 x 10-2
e. 6.3 x 10-3
37. The pH of a saturated solution of Mg(OH)2 is 10.50. The molarity of the magnesium ion is ….
a. 5.0 x 10-10
b. 1.6 x 10-3
c. 1.6 x 10-4
d. 3.2 x 10-4
e. 3.2 x 10-3
38. The pH of indicators.
Indicators pH Color
MO 3,2 - 4,4 red - yellow
MR 4,4 - 6,3 red - yellow
BTB 6,0 - 7,6 yellow - blue
PP 8,2 – 10,0 colorless - red

The correct color when these indicators are added to HClaq) are ....
a. MO, yellow – PP, colorless
b. MM, red – PP, red
c. BTB, blue – MJ, yellow
d. PP, red – BTB, yellow
e. MJ, red – PP, colorless
39. X(aq) is turning blue litmus to red color. If it is used MR, the color becomes red. The correct properties of this solution are ....
a. acid, pH < 4,4 b. acid, pH = 4,4 c. neutral, pH > 6,3
d. neutral, pH = 7
e. base, pH > 6,3
40. The pH of a solution is about 7. The correct statement of this solution is ….
a. PP, the solution becomes red
b. BTB, the solution becomes green
c. MR, the color changes to red
d. MO, the color changes to orange
e. red litmus becomes blue