Free Printable Final Exam Review SC 30224 February 2022 Second Semester

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Worksheets

Final Exam Review SC 30224 February 2022 Second Semester

Total questions: 166

Worksheet time: 6hrs 32mins

Name

Class

Date

1.

A substance is found to have the following characteristics:

Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water

In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

2.

HF is...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

3.

HNO₂

a)

a base

b)

a salt

c)

an acid

d)

an ionic compound

4.

Releases hydrogen in an aqueous solution.

a)

base

b)

strong base

c)

acid

d)

weak base

5.

KOH is ...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

6.

Which of the following statements is correct?

a)

Blue litmus paper turns red when placed in a base.

b)

Red litmus paper turns blue when placed in a base.

c)

Blue litmus paper stays blue when placed in an acid.

d)

Red litmus paper stays red when placed in a base.

7.

What is the [H⁺] if the pH is 4.0?

a)

1.0 x 10^-10 M

b)

1.0 x 10^-4M

c)

1.0 x 10^-14 M

d)

1.0 x 10^-7 M

8.

What is the pOH of a solution that has a pH of 2?

a)

10

b)

12

c)

14

d)

1

9.

What is a titration?

a)

when the moles of hydrogen ions is equal to the moles of hydroxide ions

b)

adding a known amount of solution of known concentration to determine the concentration of an unknown

c)

reaction in which an acid and a base react in an aqueous solution to produce a salt and water

d)

the extent of ionization of an acid or base

10.

Phenolophalein turns from clear to pink when the pH turns

a)

acidic

b)

basic

c)

saline

d)

ionic

11.

What completely ionizes in solution?

a)

Weak acids

b)

Strong acids

c)

Strong Salts

d)

Neutral salts

12.

If an acid is combined with a base of equal strength, the result will most likely be

a)

a neutral solution.

b)

a stronger acid.

c)

impossible to tell without testing the pH.

d)

a stronger base

13.

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

a)

3

b)

9

c)

7

d)

5

14.

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

a)

strongly acidic

b)

slightly acidic

c)

strongly basic

d)

slightly basic

15.

Acids react with

a)

water to produce bases and salts

b)

salts to produce bases and water

c)

neither bases, salts nor water

d)

bases to produce salts and water

16.

Base change red litmus paper to blue.

a)

True

b)

False

17.

Character of acid is having sour taste.

a)

True

b)

False

18.

Acid change blue litmus paper to red.

a)

True

b)

False

19.

How do acids taste compared to bases?

a)

Acid is sweet and base is sour

b)

Acid is bitter and base is sour

c)

Acid is sour and base is bitter

20.

Which of the following is a base?

a)

Orange juice

b)

Water

c)

Vinegar

d)

Toothpaste

21.

Which of the following statements is correct?

a)

Blue litmus paper turns red when placed in a base.

b)

Red litmus paper turns blue when placed in a base.

c)

Blue litmus paper stays blue when placed in an acid.

d)

Red litmus paper stays red when placed in a base.

22.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

23.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

24.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

25.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

26.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

27.

Choose the correct answer. Acid or base?

a)

Acid

b)

Base

28.

Neutralization reactions

a)

formed from joining positive and negative ions

b)

increases OH ions

c)

froms a salt and water

d)

increases H2O ions

29.

According to the pH range which substance is more acidic than lemon juice

a)

Hydrochloric acid

b)

cabbage

c)

milk

30.

What is a titration?

a)

when the moles of hydrogen ions is equal to the moles of hydroxide ions

b)

adding a known amount of solution of known concentration to determine the concentration of an unknown

c)

reaction in which an acid and a base react in an aqueous solution to produce a salt and water

d)

the extent of ionization of an acid or base

31.

Do acids and bases conduct electricity?

a)

Only acids conduct electricity

b)

Only bases conduct electricity

c)

Bases and acids conduct electricity

d)

Neither conduct electricity

32.

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red.

Which of the following represents the most logical conclusion?

a)

The substance has a pH value of "2".

b)

The substance is a base.

c)

The substance has a pH value of "7".

d)

The substance is acidic.

33.

Acidic solutions exhibit a higher ratio of H₃O⁺ ions, known as...

a)

neutrons

b)

hydroxide

c)

electrons

d)

hydronium

34.

What range of values on the pH scale represent solutions with a higher ratio of hydroxide (OH^-) ions?

a)

below 7

b)

7

c)

above 7

d)

0-14

35.

Acids are __________, which means they "eat away" at other materials.

a)

transitional metal

b)

alkaline

c)

flammable

d)

corrosive

36.

Zinc granules on treating with an acid X, forms zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.

a)

X-Sulphuric acid and Y- Oxygen gas

b)

X- Hydrochloric acid and Y- Oxygen gas

c)

X- Sulphuric acid and Y- Hydrogen gas

d)

X- Hydrochloric acid and Y- Hydrogen ga

37.

Which of the following indicators turn red in an acidic solution?

a)

phenolphthalein

b)

red litmus

c)

turmeric

d)

methyl orange

38.

Identify the products of the following reaction:

CaCO3 + 2HCl -->

a)

Calcium hydrogen carbonate and chlorine gas

b)

Calcium chloride and water

c)

Calcium oxide, carbon dioxide and water

d)

Calcium chloride, carbon dioxide and water

39.

Identify the gas evolved.

a)

Hydrogen

b)

Nitrogen

c)

Carbon dioxide

d)

Oxygen

40.

Which one of the following can be used as an acid-base indicator by a visually impaired student?

a)

Litmus

b)

Turmeric

c)

Methyl Orange

d)

Vanilla essence

41.

Which of the following salts does not contain water of crystallisation?

a)

Blue vitreol

b)

Baking soda

c)

Washing soda

d)

Gypsum

42.

Which of the following salts will give an aqueous solution having pH of almost 7?

a)

Ammonium nitrate

b)

Ammonium chloride

c)

Calcium chloride

d)

Sodium chloride

43.

Which of the following substances contain an alkali?

a)

Baking powder

b)

Coca cola

c)

Distilled water

d)

Vinegar

44.

Which of the following substances contain acid?

a)

An orange

b)

Bleach

c)

Distilled water

d)

Washing powder

45.

Which of the following pH numbers indicates a neutral substance?

a)

1

b)

5

c)

7

d)

14

46.

Which of the following pH numbers indicates a strong acid?

a)

1

b)

5

c)

7

d)

14

47.

Which of the following pH numbers indicate a strong alkali?

a)

1

b)

5

c)

7

d)

14

48.

What is the pH of pure water?

a)

pH 7

b)

pH 3

c)

pH 12

d)

pH 8

49.

What two substance are formed when an acid and alkali react together in equal amounts?

a)

Salt and water

b)

Alkali and water

c)

Acid and water

d)

Acid and alkali

50.

What substance could you use to test if a substance is an acid or alkali?

a)

Indicator

b)

Salt

c)

Catalyst

d)

Water

51.

When found in food, acids are ________

a)

Sour

b)

Bitter

c)

Salty

d)

Slippery

52.

When dissolved in water, acids produce:

a)

bases

b)

salts

c)

hydrogen (H⁺) ions

d)

hydroxide (OH^-) ions

53.

A common alkali used in the lab is

a)

hydrochloric acid

b)

sodium chloride

c)

hydrogen sulphate

d)

sodium hydroxide

54.

The pH scale is a range from:

a)

1-7

b)

0-14

c)

1-14

d)

1-20

55.

Acid in vinegar:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

56.

When dissolved in water, bases produce:

a)

bases

b)

salts

c)

hydrogen (H⁺) ions

d)

hydroxide (OH^-) ions

57.

Which of the following is not the properties of alkalis?

a)

Slipery

b)

Have a pH less than 7

c)

The pH scale of alkalis from 8 - 14

d)

Corrosive

58.

Which of the following is acid?

a)

b)

c)

59.

Which of the following is alkali?

a)

b)

c)

60.

Which of the following is neutral?

a)

b)

c)

61.

$Acid\ +\ Alkali\ \rightarrow\ ....\ +\ Water$

a)

Hydrogen

b)

Water

c)

Carbon dioxide

d)

Salt

62.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

63.

Concentration is

a)

the amount of solute in the solvent

b)

the amount of solvent in the solute

c)

density

d)

particle size

64.

Which solution is more concentrated?

Solution 1:

100 g of salt in 500 cm³ of water

Solution 2:

90 g of salt in 500 cm³ of water

a)

Solution 1

b)

Solution 2

c)

They have the same concentration

d)

I have no idea

65.

Lemon is in acid, alkali or neutral group?

a)

Acid

b)

Alkali

c)

Neutral

66.

What is the meaning of the above hazard warning symbol?

a)

Corrosive

b)

Explosive

c)

Toxic

d)

Radioactive

67.

Reaction between acid and alkali producing salt and water are called

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

68.

Which of the following about properties of acid is not true?

a)

pH less than 7

b)

Tastes bitter

c)

Corrosive

d)

Turns blue litmus paper to red

69.

Nitric acid + __________ $\rightarrow$ Sodium nitrate + Water

a)

Aluminium oxide

b)

Magnesium hydroxide

c)

Sodium hydroxide

70.

What is the property of acids and alkali that is shown in the video?

a)

Flammable

b)

Corrosive

c)

Irritant

d)

Biohazardous

71.

What is the definition of acid?

a)

An acid is a substance that ionized in water to produce hydrogen ion

b)

An acid is a subtance that ionized in water to produce hydroxide ion

72.

Which substance have a soapy touch?

a)

Acid

b)

Alkali

73.

What is the definition of alkali?

a)

An alkali is a substance that ionized in water to produce hydrogen ion

b)

An alkali is a subtance that ionized in water to produce hydroxide ion

74.

Name the ion that responsible to show alkaline properties.

a)

hidrogen ion

b)

hydroxide ion

75.

Name the ion that responsible to show acidic properties.

a)

hidrogen ion

b)

hydroxide ion

76.

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red.

Which of the following represents the most logical conclusion?

a)

The substance has a pH value of "2".

b)

The substance is a base.

c)

The substance has a pH value of "7".

d)

The substance is acidic.

77.

Hydrochloric acid + Sodium hyroxide $\rightarrow$ ____________ + Water

a)

Sodium sulphate

b)

Sodium chloride

c)

Sodium nitrate

78.

Is HNO₃ an acid or base?

a)

Acid

b)

Base

79.

KOH will release which ion?

a)

OH-

b)

H+

c)

OH+

d)

H-

80.

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

a)

strongly acidic

b)

slightly acidic

c)

strongly basic

d)

slightly basic

81.

Select the formula for the following acid: hydroiodic acid

a)

HI

b)

HIO₄

c)

HIO₃

d)

H₂I

82.

Select the name for the following acid: H₃PO₄

a)

Phosphoric acid

b)

Phosphorous acid

c)

Hydrophosphoric acid

83.

Select the name of the following acid: HCl

a)

Hydrochloric acid

b)

Chlorous acid

c)

Chloric acid

84.

Which of these pH values would indicate that a solution is a weak base?

a)

4

b)

5.6

c)

8

d)

13

85.

If you have an oxyacid and it contains an -ate polyatomic ion, then acid's ending will change to _____.

a)

-ic

b)

-ous

c)

-ite

86.

NH₃is:

a)

a Bronsted Lowry base

b)

an Arrhenius base

c)

an acid

d)

both an Arrhenius and a Bronsted Lowry base

87.

a compound that increase H+ or H3O+ concentration by making the solution more acidic is called

a)

arrhenius acid

b)

arrhenus base

88.

An acid has a pH

a)

higher than 7

b)

lower than 7

c)

7

d)

greater than 14

89.

the H in pH stands for

a)

hood

b)

happy

c)

hydrogen

d)

help

90.

lemon juice is a

a)

acid

b)

base

91.

bleach is

a)

an acid

b)

a base

92.

acids taste

a)

bitter

b)

sour

c)

furry

93.

bases taste

a)

bitter

b)

sour

c)

like candy

94.

if you add an acid to a base what will happen?

a)

BOOM

b)

it will neutralize

c)

it wont mix

95.

NH₃ + H₂O → NH₄⁺ + OH^-

NH₃ is a Bronsted Lowry

a)

Acid

b)

Base

c)

conjugate acid

d)

conjugate base

96.

Which of the following is a neutralization reaction?

a)

2Na + Cl₂ → 2NaCl

b)

CH₄ + 2O₂ → CO₂ + 2H₂O

c)

HCl + KOH → KCl + H₂O

d)

CaCO₃ → CO₂ + CaO

97.

What is the pH of a reaction between a strong acid and strong base?

a)

0

b)

5

c)

10

d)

7

98.

HNO₃ + H₂O → H₃O⁺ + NO₃^1-

NO₃^1- is the conjugate base of

a)

H₂O

b)

HNO₃

c)

H₃O⁺

d)

none of the above

99.

HCO₃^- + H₂O → H₃O⁺ + CO₃^2-

Water is acting as

a)

a Bronsted Lowry base

b)

a Bronsted Lowry acid

c)

a strong acid

d)

a weak acid

100.

HC₂H₃O₂ + H₂O → H₃O⁺ + C₂H₃O₂^1-

HC₂H₃O₂is acting as

a)

a conjugate base

b)

a Bronsted Lowry base

c)

a Bronsted Lowry acid

d)

none of the above

101.

What is the conjugate base of H₂SO₄?

a)

SO₄^2-

b)

H₂SO₃

c)

HSO₃^1-

d)

HSO₄^1-

102.

HBr is the conjugate acid of

a)

Br^1-

b)

Br₂

c)

H₂Br

d)

none of the above

103.

Which of the following is a strong base?

a)

NH₃

b)

Zn(OH)₂

c)

HCl

d)

CsOH

104.

Which of the following is a strong acid?

a)

NaOH

b)

HCl

c)

HF

d)

H₂O

105.

Identify the salt in the following equation:
Zn(OH)₂ + HNO₃ ---> H₂O + Zn(NO₃)₂

a)

Zn(OH)₂

b)

HNO₃

c)

H₂O

d)

Zn(NO₃)₂

106.

Which of these solutions is an acid?

a)

Dish Soap: pH of 12

b)

Tomato Soup: pH of 4

c)

Baking Soda: pH of 9

d)

Drain Cleaner: pH of 14

107.

BASE + ACID ----> SALT +?

a)

water

b)

oxygen

c)

hydrogen ion

d)

hydroxide ion

108.

What is the name of this ion: H₃O⁺?

a)

helium ion

b)

hydrogen ion

c)

hepatic ion

d)

hydronium ion

109.

A drop of solution 'X' is placed on a strip of pH paper. A deep red colour is produced. The solution 'X' is

a)

NaOH

b)

HCl

c)

H₂O

d)

Na₂CO₃

110.

A solution has a pOH of 12. Which best describes the solution?

a)

It has a pH of 2 and is a base.

b)

It has a pH of 12 and is a base.

c)

It has a pH of 2 and is an acid.

d)

It has a pH of 12 and is an acid.

111.

A student describes a liquid as feeling slippery. The student places red litmus paper into the liquid, and the paper turns blue. What can the student conclude

from these observations?

a)

The substance is likely a nonmetal

b)

The substance is likely a metal

c)

The substance is likely a base

d)

The substance is likely an acid.

112.

An acid-base titration is represented by the chemical equation below.

CsOH (aq) + HBr (aq) → CsBr (aq) + H2O (l)

In the titration, 15.0 mL of CsOH solution is neutralized by 38.2 mL of 0.250 M HBr solution. What is the molarity of the CsOH solution

a)

0.0982 M

b)

0.637 M

c)

1.36 M

d)

10.2 M

113.

A student conducts an experiment to identify the pH of some common household substances. The data is recorded in this table.

Which substance would be classified as containing the highest concentration of hydroxide ions?

a)

Ammonia

b)

Drain Cleaner

c)

Lemon Juice

d)

Vinegar

114.

What type of solution is formed when solid sodium hydroxide (NaOH) is dissolved in water?

a)

an electrolytic solution, because NaOH will dissociate into ions

b)

an electrolytic solution, because NaOH will not dissociate into ions

c)

a nonelectrolytic solution, because NaOH will dissociate into ions

d)

a nonelectrolytic solution, because NaOH will not dissociate into ions

115.

Why is KOH considered to be an Arrhenius base?

a)

It produces OH+ ions in solution.

b)

It produces H– ions in solution.

c)

It produces H+ ions in solution.

d)

It produces OH– ions in solution.

116.

The chart below shows the characteristics of several common acid-base indicators.

Which indicator would appear to be yellow in a solution with a hydrogen ion concentration of 1.0 x 10^-7?

a)

Bromocresol Green

b)

Congo Red

c)

Phenol Red

d)

Indigo Carmine

117.

Which substance can act as either an

acid or a base according to the

Brønsted-Lowry definition?

a)

H₃O⁺

b)

NH₄⁺

c)

HOH (H2O)

d)

HCl

118.

a)

1,67 M

b)

1.25 M

c)

0.600 M

d)

0.450 M

119.

Which is a characteristic of a strong

acid?

a)

It has a pH greater than 7.

b)

It completely ionizes in solution

c)

It contains many hydroxide ions.

d)

It reacts only with a strong base.

120.

What is the [H+ ] of an HCl solution if

the pH is measured to be 6?

a)

1 × 10^{-7 M}

b)

1 × 10^{-6 M}

c)

6 × 10^{-6 M}

d)

8 × 10^{-1 M}

121.

Consider the general equation for an acid in water:
HA(aq) + H₂O ↔ H₃O⁺ + A^-If there is a lot of product, what does that tell you about the acid?

a)

K_a > 1 Strong acid

b)

K_a > 1 Weak acid

c)

K_a < 1 Strong acid

d)

K_a < 1 Weak acid

122.

Which of the following is not a strong acid?

a)

nitric

b)

sulfuric

c)

perchloric

d)

hydrofluoric

123.

Which of the following is the conjugate acid of HCO₃^-1?

a)

H₂CO₃

b)

CO₃^-2

c)

H₂CO_3^-1

d)

CO₃^-1

124.

The pH of a solution at 25^ₒC in which [OH-] = 3.9 x 10^-5M is:

a)

4.41

b)

3.90

c)

9.59

d)

4.80

125.

What is $K_{w\ }$ ?

a)

Is the dissociation constant of weak acid reaction.

b)

Is the dissociation constant of weak base reaction.

c)

Is the dissociation constant of the Auto Ionization of water.

d)

Is the dissociation constant of any equilibrium reaction.

126.

Acidic buffer is made up of

a)

weak acid and weak base

b)

weak acid and its conjugate salt

c)

weak acid and its conjugate base

d)

strong acid and its conjugate base

127.

a buffer solution is made by mixing HA, a weak acid, with salts containing A^- ions.

HA ↔ H⁺ + A^-

a formula that can be used for the calculation of the pH of this buffer solution is

a)

b)

c)

d)

128.

a buffer solution is made of mixture of aqueous ethanoic acid, CH₃COOH, with aqueous potassium ethanoate, KCH₃COO.

the equilibrium reaction takes place in buffer solution is :

CH₃COOH ↔ CH₃COO^- + H⁺

small amount of HCl is then added to that buffer solution.

What reaction take places at the buffer solution to resist change of pH caused by addition of acid?

a)

CH₃COO^- + H⁺→ CH₃COOH

b)

CH₃COO^- + OH^-→ CH₂COO^2- + H₂O

c)

CH₃COOH + H⁺→ CH₃COOH₂

d)

CH₃COOH + OH^-→ CH₃COO^- + H₂O

129.

Which of the following statements ARE TRUE about buffer solution?

(you may choose more than one answer)

a)

pH of buffer solution will never change despite addition of small amount of base or acid

b)

Buffer can be made by mixing weak acid and salt of its conjugate base or by mixing weak base with salt of its conjugate acid

c)

Buffer has acid and base components that can work specifically to resist pH change

d)

the closer the ratio of concentration weak acid/base to the concentration of salt of its conjugate base/acid, the less effective the buffer to resist pH change

130.

The salt shown below is

a)

Acidic

b)

Basic

c)

Neutral

d)

None of the above

131.

A bronsted lowry acid

a)

produces hydroxide ions in a solution

b)

is a proton donor

c)

produces hydrogen ions in a solution

d)

is a proton acceptor

132.

A bronsted lowry base

a)

produces hydroxide ions in a solution

b)

is a proton donor

c)

produces hydrogen ions in a solution

d)

is a proton acceptor

133.

An arrhenius base

a)

produces hydroxide ions in a solution

b)

is a proton donor

c)

produces hydrogen ions in a solution

d)

is a proton acceptor

134.

An arrhenius acid

a)

produces hydroxide ions in a solution

b)

is a proton donor

c)

produces hydrogen ions in a solution

d)

is a proton acceptor

135.

Which of the following is NOT a strong base?

a)

NaOH

b)

RbOH

c)

Al(OH)₃

d)

Ca(OH)₂

136.

Choose the correct statements about HI based on the following reaction (select all that apply):

HI + H₂O --> I^- + H₃O⁺

a)

HI is an arrhenius acid

b)

HI is an arrhenius base

c)

HI is a bronsted lowry acid

d)

HI is a bronsted lowry base

137.

Could C₂H₃O₂^-act as a base when placed in water?

a)

Yes, because it can accept a H⁺

b)

Yes, because it can donate a H⁺

c)

No, because it cannot donate a H⁺

d)

No, because it cannot accept a H⁺

138.

Which of the following show an acid and its conjugate base pair (in that order)

a)

H₂SO₄, SO₄^2-

b)

OH^-, H₂O

c)

NH₄⁺, H₂O

d)

H₂CO₃, HCO₃^-

139.

The following statement is true for arrhenius acid and base EXCEPT

a)

Arrhenius acid produces H⁺ ions

b)

Arrhenius base produces OH^- ions

c)

H₂O need to be present for arrhenius acid base to dissociate

d)

Hydrogen atoms that make the solution acidic

140.

The following statement is true for Bronsted Lowry Conjugate Acid Base pair EXCEPT

a)

Bronsted Lowry Acid is a proton donor

b)

Bronsted Lowry Acid is a electron pair acceptor

c)

Conjugate acid has 1 hydrogen atom more than base

d)

Conjugate base has 1 hydroxide more than base

141.

Which of the following shows the correct conjugate acid base pair?

a)

HCI (acid) / H₃O⁺ (conjugate base)

b)

HCI (acid) / CI^- (conjugate base)

c)

HCI (base) / CI^- (conjugate acid)

d)

HCI (base) / H₃O⁺ (conjugate acid)

142.

Which of the following shows the correct conjugate acid base pair?

a)

H₂O (base) / H₃O⁺ (conjugate acid)

b)

H₂O (acid) / CH₃COO^- (conjugate base)

c)

CH₃COOH (acid) / H₃O⁺ (conjugate base)

d)

CH₃COOH (base) / CH₃COO^- (conjugate acid)

143.

HCI dissociates completely and is irreversible. Why?

a)

HCI is a strong acid and CI^- is a weak base

b)

H₂O is a weak base

c)

CI^- is a strong conjugate base, will not accept H⁺ from H₃O⁺

d)

CI^- is a weak conjugate base, will not accept H⁺ from H₃O⁺

144.

CH₃COOH dissociates partially and is reversible. Why?

a)

CH₃COOH is a weak acid and H₃O⁺ is strong conjugate base

b)

CH₃COO^- is a weak base and CH₃COOH is strong conjugate acid

c)

CH₃COOH is weak acid and CH₃COO^- is strong conjugate base

d)

CH₃COOH is a weak acid and CH₃COO^- is a weak conjugate base

145.

NH₃ dissociates partially and is reversible. Why ?

a)

NH₃is a weak acid and NH₄⁺ is a strong conjugate base

b)

NH₃is a weak base and NH₄⁺ is a conjugate acid

c)

NH₄⁺ is a strong conjugate acid, donate H⁺ to form back NH₃

d)

NH₃is a weak base and OH^- is a strong conjugate acid

146.

The following statement is true EXCEPT

a)

Dissociation for strong acid is unidirectional

b)

Dissociation for weak acid is reversible

c)

Weak acid has a strong conjugate base

d)

Strong acid has a weak conjugate base

147.

The following statement is true EXCEPT

a)

Dissociation for strong acid is unidirectional

b)

Dissociation for weak acid is reversible

c)

Weak acid has a strong conjugate base

d)

Strong acid has a weak conjugate base

148.

H₂O is amphiprotic, can act as acid or base. Which of the following is TRUE ?

a)

H₂O is an acid because it is a proton donor

b)

H₂O is an base because it is a proton acceptor

c)

H₂O can gain or lose a proton, H⁺

d)

H₂O can easily form hydronium ion, H₃O⁺

149.

The following statement is true for Lewis acid EXCEPT

a)

Lewis acid are electrophiles

b)

Lewis acid are proton acceptor

c)

Lewis acid are electron pair acceptor

d)

Lewis acid are electron deficient

150.

The following statement is true for Lewis acid EXCEPT

a)

Lewis acid are electrophiles

b)

Lewis acid are proton acceptor

c)

Lewis acid are electron pair acceptor

d)

Lewis acid are electron deficient

151.

The following statement is true for Lewis bases EXCEPT

a)

Lewis bases are nucleophiles

b)

Lewis bases are proton donors

c)

Lewis bases are electron pair donor

d)

Lewis bases are electron rich

152.

The following is true for Lewis acid and base EXCEPT

a)

BF₃ is a Lewis acid

b)

NH₃ is Lewis base

c)

BF₃ is a electron pair acceptor

d)

NH₃ is a lone pair acceptor

153.

The following is true for Lewis acid and base EXCEPT

a)

CO₂ is a Lewis acid

b)

H₂O is Lewis base

c)

CO₂ is a electron pair acceptor

d)

H₂O is a lone pair acceptor

154.

The following statement is true for transition metals as Lewis acids EXCEPT

a)

Transition metal ions act as Lewis acid

b)

Transition metals are proton acceptor

c)

Transition metals are electron pair acceptor

d)

Transition metal are electron deficient

155.

The following statement is true for ligand as Lewis base EXCEPT

a)

Ligands act as nucleophile

b)

Ligands are electron pair donor

c)

Ligands are lone pair acceptor

d)

Ligands are electron rich

156.

The following statement is true for ligands and transition metals EXCEPT

a)

Ligands act as Lewis base

b)

Ligands are electron pair donor

c)

Transition metals act as Lewis acid

d)

Transition metals are proton acceptors

157.

Which is a characteristic of a base?

a)

Tastes sour.

b)

Found mostly in foods.

c)

Feels slippery.

d)

Turn litmus paper red.

158.

According to Arrhenius, what is the definition of an ACID?

a)

A substance that contains hydroxide and ionizes to produce OH^-.

b)

A substance that contains hydrogen and ionizes to produce H⁺.

c)

A substance that contains hydrogen and ionizes to produce OH^-.

d)

A substance that contains hydroxide and ionizes to produce H⁺.

159.

According to Bronsted-Lowry, what is the definition of a BASE?

a)

A substance that donates a hydrogen (H⁺) ion.

b)

A substance that donates a hydroxide (OH^-) ion.

c)

A substance that accepts a hydrogen (H⁺) ion.

d)

A substance that accepts a hydroxide (OH^-) ion.

160.

What is being donated/accepted between conjugate acid-base pairs?

a)

A hydrogen (H⁺) ion.

b)

A hydroxide (OH^-) ion.

c)

Water.

d)

A neutron.

161.

What is the conjugate base in the following reaction?

a)

HCO₃^-

b)

HCl

c)

H₂CO₃

d)

Cl^-

162.

What is the conjugate acid in the following equation?

a)

PO₄^3-

b)

HNO₃

c)

NO₃^-

d)

HPO₄^2-

163.

Which of the following correctly identifies an Acid-Base Pair?

a)

HH₄⁺, OH^-

b)

H₂O , OH^-

c)

CaCO_{3 ,}CaCl₂

d)

HNO₃ , H₂SO₄

164.

If a solution is basic which ion will be more present?

a)

H⁺

b)

K⁺

c)

OH^-

d)

H^-

165.

NH₃ + H₂O --> NH₄⁺+ OH^{-
What is the conjugate acid according the Bronsted-Lowry model?}

a)

NH₃

b)

H₂O

c)

NH₄⁺

d)

OH^-

166.

Barium hydroxide is a strong base.

a)

True

b)

False

100 %

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