Unit 13 Exam Review

Question 1

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?:

Answer 1

the equivalence point has been reached

Question 2

Which of the following bases is strong?:
     • sodium hydroxide
     • magnesium hydroxide
     • ammonia
     • vinegar

Answer 2

sodium hydroxide

Question 3

When an acid reacts with a base, what compounds are produced?:

Answer 3

salt and water

Question 4

Which type of solution is one with a pH of 8?:

Answer 4

basic

Question 5

With solutions of strong acids and strong bases, the word strong refers to _______:

Answer 5

ionization

Question 6

Which of the following represents a Brønsted-Lowry conjugate acid-base pair?:
     • SO32- and SO2
     • NH4+ and NH3
     • CO and COOH
     • HCl and NaCl

Answer 6

NH4+ and NH3

Question 7

Which compound can act as both a Brønsted-Lowry acid and a Brønsted-Lowry base?:
     • Hydrochloric acid
     • Sodium hydroxide
     • water
     • vinegar

Answer 7

water

Question 8

What type of acid is phosphoric acid?:

Answer 8

triprotic

Question 9

What is an acid according to Arrhenius?:

Answer 9

A substance that releases H+ when placed in water

Question 10

Which of these is an Arrhenius base?:
     • CH3COOH
     • LiOH
     • NH3
     • HCl

Answer 10

LiOH

Question 11

In a neutral solution, the [H+] is:

Answer 11

1 x 10^-7

Question 12

The acid dissociation constant (Ka) for an acid dissolved in water is equal to the _______ x _________:

Answer 12

[H+] [OH-] // [H3O+] [OH-]

Question 13

A 0.12 M solution of an acid that ionizes only slightly in solution would be termed _____:

Answer 13

weak

Question 14

What is transferred between a conjugate acid-base pair?:

Answer 14

a proton

Question 15

What are the acids in the following:

CN- + H2O <===> HCN + OH- ?

Answer 15

H2O and HCN

Question 16

A Lewis acid is a substance that can:

Answer 16

accept an electron pair

Question 17

The process of adding a known amount of solution of known concentration to determine the concentration of another solution is called _______:

Answer 17

titration

Question 18

If the hydroxide-ion concentration is 1 x 10^-12 M, what is the pH of the solution?:

Answer 18

2

Question 19

What is the hydrogen-ion concentration if the pH is 3.7?:

Answer 19

2 x 10^-4

Question 20

What is the pH of a solution with a concentration of 0.01 M HCl?:

Answer 20

2

Question 21

If [OH-] = 1 x 10^-4 M, what is the pH of the solution?:

Answer 21

10

Question 22

A substance with a large Ka would be considered a:

Answer 22

strong acid

Question 23

During a titration, the indicator changing colour indicates that the ______ has been reached:

Answer 23

end point

Question 24

Which of the following is a property of an acid?:
     • pH less than 7
     • sour taste
     • [H+] > [OH-] 
     • all of the above

Answer 24

all of the above

Question 25

Which of the following is a property of a base?:
     • bitter
     • slippery feel
     • [H+] < [OH-]
     • all of the above

Answer 25

all of the above