Unit 15

Question 1

The pH of a 0.01 molar aqueous solution of HCl would equal to

a. -1
b. 1
c. 2
d. 13

Answer 1

C.

Question 2

The hydrogen ion concentration is 1x10-10. What is the pH of this solution?

Answer 2

10

Question 3

A substance that contains hydrogen and ionizes to form hydrogen ion is a -

a. Arrhenius acid
b. Lewis acid
c. Bronsted-Lowry acid
d. Arrhenius base

Answer 3

A.

Question 4

What is represented by the pH of a solution?
Concentration of hydrogen ions in the solution
a. Temperature of hydrogen ions in the solution
b. Electronegativity of dissociated hydrogen ions in the solution
c. Concentration of hydrogen ions in the solution
d.Partial pressure of hydrogen ions in the solution

Answer 4

C.

Question 5

According to this theory, an acid is a proton (H+) donor and a base is a proton acceptor.
Arrhenius
Brønsted-Lowry
Lewis
Petras
Meyer

Answer 5

Brownsted-Lowry

Question 6

Name the following formula:  H3PO4
Hydrogen Phosphorous acid
Phosphorous acid
Phosphoric acid
Phosphorate acid

Answer 6

c

Question 7

What is the formula for HCl

Answer 7

Hydrochloric acid

Question 8

Calculate both the pH / pOH of a 0.065 M LiOH solution. (Hint: Is this a strong base?)

12. 8 / 1.2
13. 9 / 0.065
14. 2 / 12.8
15. 065 / 13.9

Answer 8

A.

Question 9

Name the acid HNO2.

Answer 9

Nitrous acid

Question 10

NO2 and N2O4 undergo the reaction shown. When a sealed container of reaches chemical equilibrium, which must be true?
No is present.
No chemical reactions are occurring.
The rates of the forward and reverse reactions are equal.
The maximum number of molecules has been reached.

Answer 10

c

Question 11

A _____ is produced when a base accepts a hydrogen ion from an acid.

a. acid
b. base
c. conjugate base
d. conjugate acid

Answer 11

D.

Question 12

Identify the acid and conjugate base pair in the following equation:
HF + H2O –> H3O+ + F-

Answer 12

Acid: HF

Conjugate Base Pair: F-

Question 13

The process of adding a known amount of solution of known concentration to determine the concentration of another solution is called ____.

Answer 13

Titration

Question 14

In a titration, when the number of moles of hydrogen ions equals the number of moles of hydroxide ions, what is said to have happened?

a. The titration has failed.
b. The point of neutralization has been reached.
c. The end point has been reached.
d. The equivalence point has been reached.

Answer 14

D.

Question 15

What characterizes a strong acid or base?

Answer 15

Complete ionization in water