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1
Q

Carbon atoms usually… (electrons)

A

Form 4 covalent bonds

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2
Q

Coke is produced from bituminous coal by…

A

Destructive distillation

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3
Q

The usual method for preparing CO2 in the laboratory is…

A

Reacting an acid & a carbonate

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4
Q

What is the precipitate formed when CO2 is bubbled into limewater?

A

CaCO3

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5
Q

What is the “lead” in the pencil?

A

Graphite & clay

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6
Q

What is the first & simplest alkane?

A

Methane

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7
Q

What does a slight oxidation of a primary alcohol give?

A

An aldehyde

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8
Q

What is the characteristic group of an organic ester?

A

-COO-

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9
Q

What is the organic acid that can be made from ethanol?

A

Acetic acid

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10
Q

What reaction can an ester be prepared by?

A

An alcohol & an organic acid

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11
Q

What compounds that have the same composition but differ in their structural formulas called?

A

Isomers

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12
Q

Ethene is the first member of…

A

Alkene series

Unsaturated hydrocarbons

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13
Q

What is the most active nonmetallic element?

A

Fluorine

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14
Q

What is the order of decreasing activity of the halogens?

A

F, Cl, Br, I

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15
Q

What formula does a light-sensitive substance used on photographic film have

A

AgBr

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16
Q

Sulfur dioxide is the anhydride of

A

Sulfurous acid

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17
Q

The charring action of sulfuric acid is due to it being…

A

A dehydrating agent

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18
Q

Ammonia is prepared commercially by the…

A

Combining of hydrogen & nitrogen gases

Haber process

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19
Q

A nitrogen that has a color is…

A

Nitrogen dioxide

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20
Q

If a student heats a mixture of ammonium chloride & calcium hydroxide in a test tube, he will detect

A

The odor of ammonia

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21
Q

The difference between ammonia & the ammonium ion is…

A

A proton

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22
Q

An important ore of iron

A

Hematite

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23
Q

A reducing agent used in the blast furnace

A

CO

Carbon monoxide

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24
Q

The metal with the electron shell configuration of [Ar]3d(10)4s(1)

A

Cu, copper

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25
Q

Reaction type that can be viewed as redox often involving hydrocarbon fuels & oxygen releasing heat & light

A

Combustion

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26
Q

Reaction type that can be viewed as redox involving an element & a compound becoming a new element & a new compound

A

Single Replacement

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27
Q

Reaction type that does not generally involve the transfer of electrons & is NOT viewed as a redox reaction

A

Acid/base

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28
Q

Reaction type that could possibly be viewed as a redox reaction in which only one substance is present in the reactants

A

Decomposition

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29
Q

Oxidation state for S in Na2SO3

A

+4

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30
Q

Oxidation state for P in PO4 (3-)

A

+5

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31
Q

Oxidation state for Ca in CaCO3

A

+2

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32
Q

Oxidation state for S in SO2

A

+4

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33
Q

Oxidation state for Cr in K2CrO4

A

+6

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34
Q

Reducing agents are substances that

A

Contain elements that are oxidized

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35
Q

When elemental bromine (Br2) reacts with a solution of sodium iodide (NaI)

A

Bromine will be reduced

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36
Q

The difference between HCl & HC2H3O2 as acids is

A

The first is highly ionized

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37
Q

The hydronium ion is represented as

A

H3O (+)

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38
Q

H2SO4 is a strong acid because it is

A

Highly ionized

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39
Q

The common ionic reaction if an acid with a base involves ions of…

A

Hydrogen & hydroxide

40
Q

The pH of a solution with a hydrogen ion concentration 1*10^-3 is

A

+3

41
Q

What is an acid according to the Bronsted-Lowry Theory

A

A proton donor

42
Q

What does a buffer solution do

A

Resists changes in pH

43
Q

What is the point at which a titration is complete called?

A

End point

44
Q

The concentrations in an expression of the equilibrium constant are given in…

A

mol/L

45
Q

The equilibrium constant of water at 298K is equal to

A

1*10^-7

46
Q

The pH of a solution that has a hydroxide ion concentration of 1*10^-4 mole/liter is

A

10

47
Q

The pH of a solution that has a hydrogen ion concentration of 1*10^-4 mole/liter is

A

4

48
Q

A small value for K, the equilibrium constant indicates that…

A

The concentration of the un-ionized molecules must be relatively large compared with the ion concentration

49
Q

In the Haber process for making ammonia, an increase in pressure favors

A

The forward reaction

50
Q

A change in which of these conditions will change the K of an equilibrium given as a starting point?

A

Temperature

51
Q

If Ca(OH)2 is dissolved in a solution of NaOH, its solubility, compared with that in pure water is

A

Decreased

52
Q

When enthalpy is negative & entropy is positive, the free energy…

A

Is always negative

53
Q

When enthalpy is positive & entropy is positive, the free energy…

A

Is negative at high temperatures

54
Q

When enthalpy is negative & entropy is negative, the free energy…

A

Is negative at lower temperatures

55
Q

When enthalpy is positive & entropy is negative, the free energy…

A

Is never negative

56
Q

When free energy is zero, the system…

A

Is at equilibrium & there is no net reaction

57
Q

List 5 factors that affect the rate of a reaction

A 
Nature of reactants
Surface area exposed
Concentrations
Catalyst presence
Temperature
58
Q

What does the addition of a catalyst to a reaction do…

A

It changes the activation energy

59
Q

An increase in concentration is related to…

A

The number of collisions directly

60
Q

At the beginning of a reaction, the reaction rate for the reactants is…

A

Largest, then decreasing

61
Q

A synthesis will occur spontaneously after the activation energy is provided if the heat of formation of the product is…

A

Large & negative

62
Q

The reaction of aluminium with dilute H2SO4 can be classified as

A

Single replacement

63
Q

For a metal atom to replace another kind of metallic ion in a solution, the metal atom must be…

A

Higher in the activity series than the metal in solution

64
Q

One reason for a double displacement reaction to go to completion is that

A

A product is given off as gas

65
Q

A salt is derived from a strong base & a weak acid will undergo hydrolysis & give a solution that will be

A

Basic

66
Q

Enthalpy is an expression for the

A

Heat content

67
Q

The heat of formation of a reaction is recorded for

A

298 K

68
Q

The property of being able to add enthalpies is based on the

A

First Law of Thermodynamcis

69
Q

Distillation of water cannot remove

A

Volatile liquids like alcohol

70
Q

The ratio in water of hydrogen to oxygen by mass is

A

1 : 8

71
Q

Decomposing water by an electric current will give a ratio of hydrogen to oxygen by volume equal to

A

2 : 1

72
Q

If 10g of ice melts at ) degrees, the total quantity of heat absorbed is

A

3,340 J

73
Q

To heat 10g of water from 4 degrees to 14 degrees requires

A

418 J

74
Q

The abnormally high boiling point of water in comparison to similar compounds is due primarily to

A

Hydrogen bonding

75
Q

A metallic oxide placed in water would most likely yield

A

A base

76
Q

A solution can be both…

A

Supersaturated & saturated

77
Q

The solubility of a solute must indicate

A

T of solution
Quantity of solute
Quantity of solvent

78
Q

A foam is an example of

A

A gas dispersed in a liquid

79
Q

When another crystal was added to a water solution of the same substance, the crystal seemed to remain unchanged.
Its particles were…

A

Exchanging places with others in the solution

80
Q

Zinc + sulfuric acid ->

A

zinc sulfate + hydrogen

81
Q

Magnesium + oxygen ->

A

magnesium oxide

82
Q

Potassium + water ->

A

potassium hydroxide + hydrogen

83
Q

In the graphic representation of the energy contents of the reactants & the resulting products in an exothermic reaction, the energy content would be

A

Higher for the reactants

84
Q

The process of separating components of a mixture by making use of the difference in their boiling points is called…

A

Fractional distillation

85
Q

When oxygen combines with an element to form a compound, the resulting compound is called

A

An oxide

86
Q

According to the activity charts of metals, which metal would react most vigorously in a dilute acid solution?

A

Magnesium

87
Q

Graham’s Law refers to

A

Gaseous diffusion

88
Q

When 200mL of a gas at constant pressure is heated, its volume…

A

Increases

89
Q

When 200mL of a gas at constant pressure is heated from ) to 100 C, the volume must be multiplied by…

A

373/273

90
Q

When the level of mercury inside a gas tube is higher than the level in the reservoir, you find the correct pressure inside the tube by taking the outside pressure reading and —–?—– the difference in the height of mercury

A

Subtracting

91
Q

When a gas is collected over water, the pressure is corrected by

A

Subtracting the water vapor pressure of water at that temperature

92
Q

AgCl

A

Silver Chloride

93
Q

CaSO4

A

Calcium sulfate

94
Q

Al2(SO4)3

A

Aluminum sulfate

95
Q

NH4NO3

A

Ammonium nitrate

96
Q

FeSO4

A

Iron (2) sulfate

Chemistry (15 decks)

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