Exam 2

Question 1

At equlibrium

Answer 1

the rates of the forward and reverse reactions are equal

Question 2

Which quantities are equal dynamic equilibrium?

Answer 2

The rates of the forward and reverse reactions

Question 3

Which one of the following will change the value of an equilibrium constant?

Answer 3

changing the temperature

Question 4

How does the value of Kc in N2O4(g)->

Answer 4

It does not depend on starting concentrations

Question 5

Consider the following reaction at equilibrium:

2CO2 (g) ->

Answer 5

Decrease the partial pressure of CO2

Question 6

Consider the following reaction at equlibrium:

C(s) +H2O (g) ->

Answer 6

Increasing the pressure of the reaction vessel

Question 7

Consider the following reaction at equilibrium:

2SO2 (g) +O2 (g) ->

Answer 7

an increase in the partial pressure of SO2

Question 8

In which of the following reactions would increasing pressure at constant temperature not change the concentrations of reactants and products, based on le Chatelier’s principle?

Answer 8

N2 (g) + O2 (g) ->

Question 9

According to the Arrhenius concept, an acid is a substance that

Answer 9

Causes an increase in the concentration of H+ in aqueous solutions

Question 10

Of the following which is the strongest acid?

Answer 10

HCLO4

Question 11

Of the following which is the weakest acid?

Answer 11

HCLO

Question 12

The conjugate base of HSO4-

Answer 12

SO4 2-

Question 13

What is the conjugate acid of NH3?

Answer 13

NH4 +

Question 14

What is the conjugate acid of CO3 2-?

Answer 14

HCO3 -

Question 15

A bronsted-lowry base is defined as a substance that

Answer 15

acts as a proton acceptor

Question 16

A bronsted lowry acid is defined as a substance that

Answer 16

acts as a proton donor

Question 17

In a basic solution

Answer 17

[H3O+]

Question 18

The magnitude of Kw indicates that

Answer 18

water autoionizes only to a very small extent