Chemistry Chapters 13

Front 1

What is a Catalyst

Back 1

C) A substance that speed up a reaction without being consumed in the reaction.

Front 2

When a reaction is at Equilibrium

Back 2

D) The forward and reverse reactions occur at the same rate.

Front 3

The activation energy of a chemical reaction is the energy that

Back 3

C) Initiates the reaction

Front 4

A chemical reaction has reached equilibrium when

Back 4

E) The rate of the forward reaction equals the rate of the reverse reaction

Front 5

In a catalyzed chemical reaction, one function of a catalyst is to

Back 5

A) Increase the number of successful reactant collisions

Front 6

In the following reaction, what is the effect of addng more NO2 to the starting reaction mixture 2NO2(g)-N2o4

Back 6

E) It would increase the final quantity of products

Front 7

Iron metal reacts with oxygen gas to produce Iron(III) oside. What will be the effect of increasing the pressure of oxygen gas in a closed reaction vessel?

Back 7

B) More Iron oxide will be produced

Front 8

In the following reaction, what is the effect on the direction of the reaction if more SO3 is added to the reaction mixture/

Back 8

D) The equilibrium shifts to produce more reactants

Front 9

In the following reaction, Kc is much less 1. at equilibrium, which of the following statements is true/

Back 9

A) The concentration of reactant is much greater than the concentration of products

Front 10

In the reaction of nitrogen gas with oxygen gas to produce nitrogen oxide, what is the effect of adding more oxygen gas to the initial reaction mixture?

Back 10

B) The equilibrium shifts to produce more NO.

Front 11

The equilibrium consant for the production of carbon dioxide from carbon monoxide and oxygen is Kc=2x10 to 11th. This means that the reaction mixture at equilibrium is likely to consist of

Back 11

E) Mostly Products

Front 12

Which of the following equilibrium constants indicates the reaction that gives the smallest amount of product/

Back 12

A) Kc=5x10-10

Front 13

For any chemical reaction to occure the reactants must

Back 13

B) Collide with sufficient energy to break bonds.

Front 14

The rate of any chemical reaction can be determined by observing

Back 14

A) The amount of product formed in a unit of time.

Front 15

In any chemical reaction, the rate of the reaction can be increased by

Back 15

E) Increasing the concentrations of the reactants.

Front 16

Refrigerating perishable foods affects biochemical reactions by

Back 16

C) Decreasing the rate of reactions affecting spoilage

Front 17

In a catalytic converter in a automobile, the reaction of carbon monoxide with oxygen produces

Back 17

A) Carbon Dioxide

Front 18

one metal that is used as a catalyst in a catalytic converter in an automobile is?

Back 18

D) Platinum

Front 19

A reaction that can proceed in either the forward or the reverse direction as written is called a

Back 19

A) Reversible Reaction

Front 20

For the equilibrium reaction of carbon dioxide with water, what is the appropriate equation?

Back 20

C) H2O+CO2----H2CO3

Front 21

What is the correct form of the equilibrium constant for the reaction of hydrogen and oxygen to form water? The equation is 2H2(g)+O2(g) 2 H2O(g)

Back 21

E) Kc=

Front 22

The following reaction is an example of what type of equilibrium reaction?
PbCl2(aq)+2NaI(aq) <- ------->
PbI2(s)+2NaCl(aq)

Back 22

B) Heterogeneous

Front 23

What is the correct form for the solubility product conxtant for lead iodide, PbI2

Back 23

D)

Front 24

The equilibrium constant for the formation of ammonia from nitrogen and hydrogen is 1.6  102. What is the form of the equilibrium constant?

Back 24

A)[NH3]2
--------------
[N2][H2]3

Front 25

The reaction for the decomposition of PCl5 to chlorine and PCl3 is shown below.
PCl5 (g) ↔ PCl3 (g) + Cl2(g)
If the equilibrium concentrations are [PCl5] = 1.0 M, [PCl3] = 0.10 M, [Cl2] = 0.10 M, what is the value of the equilibrium constant?

Back 25

A) 1.0 × 10-2

Front 26

The value of the equilibrium constant for the combination of nitrogen and oxygen to make NO is 2  10-9. What does this tell you about the concentrations of materials in the equilibrium mixture?

Back 26

D) The concentration of reactants exceeds the concentration of products

Front 27

Carbon monoxide binds to hemoglobin 140 times more strongly than oxygen does. What does this tell you about the equilibrium constants for the two reactions of hemoglobin with carbon monoxide and oxygen?

Back 27

A) The equilibrium constant for the binding of CO is greater.

Front 28

Treatment of carbon monoxide poisoning can be accomplished by the use of pure oxygen for breathing. This is an example of the use of ________ in a clinical setting.

Back 28

B) Le Chatelier's principle

Front 29

) In the reaction of carbon dioxide with water to give carbonic acid, the only gaseous component is the carbon dioxide. What will happen to the equilibrium concentration of carbonic acid if the pressure of carbon dioxide is increased in the container?

Back 29

A) The concentration of carbonic acid will increase

Front 30

Which is the correct solubility product expression for the solution of barium carbonate in water?

Back 30

E) Ksp = [Ba2+] [CO32-]

Front 31

Identify the correct form of the solubility product for silver sulfate, Ag2SO4.

Back 31

C) Ksp = [Ag+]2 [SO42-]

Front 32

The molar solubility of calcium fluoride, CaF2, is 2.0 × 10-4 M. What is the concentration of fluoride ion in a saturated solution?

Back 32

B) 4.0 × 10-4 M

Front 33

The molar solubility of lead sulfate, PbSO4, is 1.3 × 10-4 M. What is the numerical value of the Ksp?

Back 33

B) 1.7 × 10-8

Front 34

The Ksp of barium sulfate, BaSO4, is 1.1 × 10-10. In a solution that has [SO4-2] = 1.0 × 10-4, what is the maximum concentration of barium ions?

Back 34

C) 1.1 × 10-6 M

Front 35

The equilibrium for the solubility of silver sulfate is

Back 35

C) Ag2SO4 (s) ↔ 2Ag+(aq) + SO42-(aq)

Front 36

The solubility product constant is most useful when examining the behavior of ________ in water.

Back 36

A) slightly soluble salts

Front 37

An equilibrium in which all the components are gases is a ________ equilibrium

Back 37

D) homogeneous

Front 38

For the reaction of carbon with carbon dioxide to make carbon monoxide, the reaction is as follows. This is an example of a ________ equilibrium.

C(s) + CO2(g) ↔ 2CO (g)

Back 38

A) heterogeneous

Front 39

For the reaction of carbon with carbon dioxide to make carbon monoxide, the reaction is as follows. Write the form of the Kc.

Back 39

C) Kc = [CO]2/[CO2]

Front 40

For the reaction of carbon with carbon dioxide to make carbon monoxide, one set of conditions produced a Kc = 1.2 × 10-1. At equilibrium at a certain temperature, the concentration of carbon monoxide was 0.60 M. What was the concentration of carbon dioxide at that temperature?

C(s) + CO2(g) ↔ 2CO (g)

Back 40

A) 3.0 M

Front 41

For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. If the concentration of both products is 0.10 M at equilibrium, what is the concentration of the starting material, NOBr?

2NOBr(g) ↔ 2NO(g) + Br2(g)

Back 41

D) 2.2 × 10-2 M

Front 42

For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. Bromine can be liquefied easily and removed from the reaction vessel as it is formed. If this is done, how will it affect the equilibrium reaction?

2NOBr(g) ↔ 2NO(g) + Br2 (g)

Back 42

A) More products will be made as Br2 is removed.

Front 43

The Ksp of barium sulfate, BaSO4, is 1.1 × 10-10. What is the molar solubility of BaSO4?

Back 43

C) 1.0 × 10-5 M