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Chemistry Tests > Test 10, Ch. 15 > Flashcards

Test 10, Ch. 15 Flashcards

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1
Q
  1. Acid or base

Can accept a proton from another substance

A

Base

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2
Q
  1. Acid or base

Changes blue litmus paper to red

A

Acid

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3
Q
  1. Acid or base

Produces H3O+ in an aqueous solution

A

Acid

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4
Q
  1. Acid or base

Produces OH- in an aqueous solution

A

Base

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5
Q
  1. Acid or base

Can donate a proton to another substance

A

Acid

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6
Q
  1. Acid or base

Changes red litmus paper to blue

A

Base

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7
Q
  1. What is a solution in which the numbers of H3O+ and OH- ions are equal?
A

Neutral solution

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8
Q
  1. Which of the following is not a strong acid?
A

Acetic acid

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9
Q
  1. By which process do ions of some salts react with water molecules to produce OH- or H3O+ ions?
A

Hydrolysis

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10
Q
  1. What are substances such as litmus dye, phenolphthalein, and methyl violet?
A

Acid base indicators

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11
Q
  1. Which of the following statements best describes a strong acid?
A

It ionizes essentially 100% in aqueous solution

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12
Q
  1. What forms when a strong acid and a strong base react to neutralize each other?
A

Salt

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13
Q
  1. What gas is produced when an acid reacts with zinc metal?
A

Hydrogen

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14
Q
  1. What gas is produced when an acid reacts with calcium carbonate?
A

Carbon dioxide

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15
Q
  1. What forms when a Brønsted-Lowry base gains a proton?
A

Conjugate acid

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16
Q
  1. What are acids containing hydrogen, oxygen, and one other element called?
A

Oxyacids

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17
Q
  1. Which of the following is not a strong base?
A

Ammonia

18
Q

Write name of compound as an acid

21. HBr

A

Hydrobromic acid

19
Q

Write name of compound as an acid

22. H2S

A

Hydrosulfuric acid

20
Q

Write name of compound as an acid

23. H3PO4

A

Phosphoric acid

21
Q

Write name of compound as an acid

24. HF

A

Hydrofluoric acid

22
Q

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)

A

True

23
Q

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).

A

False

Titration

24
Q

True/False

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

A

False

Arrhenius concept

25
Q

True/False

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

A

False

Acidic

26
Q

True/False

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

A

False

Monoprotic acid

27
Q

True/False

31. The stronger an acid, the (stronger) it’s conjugate base.

A

False

Weaker

28
Q

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.

A

True

29
Q
  1. True/False

The negative logarithm of [H3O] concentration in a given solution is the (pOH).

A

False

pH

30
Q
  1. An ionic compound composed of any cation except H+ and any anion except OH- is called a (base).
A

False

Salt

31
Q
  1. Which of the following statements best describes the reason for hydrogen’s prominent place in an activity series?
A

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

32
Q
  1. What volume of 1 N NaOH solution could be completely neutralized by 100 ml.
A

200ml

33
Q
  1. What is the conjugate base of H3PO4?
A

H2PO4

34
Q
  1. Is a solution with a pH of 7 at 25 degrees celcious acidic, base or neutral?
A

Neutral

35
Q
  1. Is a solution with a pH of 3.5 at 25 degrees celcious acidic, base or neutral?
A

Acidic

36
Q
  1. What is the conjugate acid of NH3 ?
A

NH4

37
Q
  1. Which of the following is a polyprotic acid?
A

H2SO4

38
Q
  1. Calculate the pH of a 0.05 M solution of NaOH.
A

pH=-log(0.05)

=1.3

39
Q
  1. 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.
A

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

40
Q

Essay

Describe the titration process

A

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.

41
Q

Acid or base:

1. Has a sour taste when dissolved in water

A

Acid

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