Test 10, Ch. 15

Question 1

2. Acid or base

Can accept a proton from another substance

Answer 1

Base

Question 2

3. Acid or base

Changes blue litmus paper to red

Answer 2

Acid

Question 3

4. Acid or base

Produces H3O+ in an aqueous solution

Answer 3

Acid

Question 4

5. Acid or base

Produces OH- in an aqueous solution

Answer 4

Base

Question 5

6. Acid or base

Can donate a proton to another substance

Answer 5

Acid

Question 6

7. Acid or base

Changes red litmus paper to blue

Answer 6

Base

Question 7

8. What is a solution in which the numbers of H3O+ and OH- ions are equal?

Answer 7

Neutral solution

Question 8

9. Which of the following is not a strong acid?

Answer 8

Acetic acid

Question 9

10. By which process do ions of some salts react with water molecules to produce OH- or H3O+ ions?

Answer 9

Hydrolysis

Question 10

11. What are substances such as litmus dye, phenolphthalein, and methyl violet?

Answer 10

Acid base indicators

Question 11

12. Which of the following statements best describes a strong acid?

Answer 11

It ionizes essentially 100% in aqueous solution

Question 12

13. What forms when a strong acid and a strong base react to neutralize each other?

Answer 12

Salt

Question 13

16. What gas is produced when an acid reacts with zinc metal?

Answer 13

Hydrogen

Question 14

17. What gas is produced when an acid reacts with calcium carbonate?

Answer 14

Carbon dioxide

Question 15

18. What forms when a Brønsted-Lowry base gains a proton?

Answer 15

Conjugate acid

Question 16

19. What are acids containing hydrogen, oxygen, and one other element called?

Answer 16

Oxyacids

Question 17

20. Which of the following is not a strong base?

Answer 17

Ammonia

Question 18

Write name of compound as an acid

21. HBr

Answer 18

Hydrobromic acid

Question 19

Write name of compound as an acid

22. H2S

Answer 19

Hydrosulfuric acid

Question 20

Write name of compound as an acid

23. H3PO4

Answer 20

Phosphoric acid

Question 21

Write name of compound as an acid

24. HF

Answer 21

Hydrofluoric acid

Question 22

True/False
26. A solution that can maintain a relatively constant pH because it contains a weak acid and conjugate base or vice verse is a (buffer)

Answer 22

True

Question 23

True/False
27. Gradually adding a standard solution to a measured volume of solution of unknown concentration until the reaction is complete is called (normalization).

Answer 23

False

Titration

Question 24

True/False

28. The (Bronsted-Lowry) definition of acids and bases applies only to aqueous solutions.

Answer 24

False

Arrhenius concept

Question 25

True/False | 29. A solution containing more H3O+ ions than OH- ions is said to be (basic).

Answer 25

False | Acidic

Question 26

True/False | 30. An acid that can lose only one proton is said to be (diprotic).

Answer 26

False | Monoprotic acid

Question 27

True/False | 31. The stronger an acid, the (stronger) it's conjugate base.

Answer 27

False | Weaker

Question 28

True/False | 32. If H2SO4 is diprotic and its molar mass is 98.08 g/mol, its equivalent mass must be (49.04 g/eq.

Answer 28

True

Question 29

33. True/False | The negative logarithm of [H3O] concentration in a given solution is the (pOH).

Answer 29

False | pH

Question 30

34. An ionic compound composed of any cation except H+ and any anion except OH- is called a (base).

Answer 30

False | Salt

Question 31

36. Which of the following statements best describes the reason for hydrogen's prominent place in an activity series?

Answer 31

It is the gas evolved when an acid reacts with a metal

Question 32

38. What volume of 1 N NaOH solution could be completely neutralized by 100 ml.

Answer 32

200ml

Question 33

40. What is the conjugate base of H3PO4?

Answer 33

H2PO4

Question 34

42. Is a solution with a pH of 7 at 25 degrees celcious acidic, base or neutral?

Answer 34

Neutral

Question 35

44. Is a solution with a pH of 3.5 at 25 degrees celcious acidic, base or neutral?

Answer 35

Acidic

Question 36

45. What is the conjugate acid of NH3 ?

Answer 36

NH4

Question 37

47. Which of the following is a polyprotic acid?

Answer 37

H2SO4

Question 38

50. Calculate the pH of a 0.05 M solution of NaOH.

Answer 38

pH=-log(0.05) | =1.3

Question 39

51. 10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.

Answer 39

Molar mass: 20.006 ———— = 2.006 = 2.0 N Liters solution 10.0ml

Question 40

Essay | Describe the titration process

Answer 40

The titration process is where the gradual addition of a standard solution to a measured volume of solution of unknown concentration until the reaction is complete or the volume of concentration has be neutralized or balanced.

Question 41

Acid or base: | 1. Has a sour taste when dissolved in water

Answer 41

Acid