Equilibrium QQ Trade Pt. 2

Question 1

What is pH a measure of?

Answer 1

the concentration of H+ ions in a solution

Question 2

List 3 strong acids and explain why these acids are considered strong acids.

Answer 2

H2SO4, HNO3, HCl, HBr, HI, HClO4
- they dissociate (ionize) 100% in water giving the maximum amount of H3O+ ions from the compound
- they donate all H+ ions

Question 3

If the acid is strong, the conjugate base would be..

Answer 3

weaker

Question 4

Relationship between acid/base strength and pKa/pKb

Answer 4

• the stronger the acid the lower the pKa and vice versa
• the stronger the base the lower the pKb and vice versa

Question 5

What are the strong acids

Answer 5

HNO3, HCl, HBr, HI, HClO4, H2SO4

Question 6

What are the strong bases

Answer 6

group 1 & 2 hydroxides except Be(OH)2

Question 7

Ka and Kb are the..

Answer 7

acid/base ionizationation constant (unitless and temp dependent)

Question 8

kw is the

Answer 8

ionization constant of water, it determines the acidity or alkalinity of a solution

Question 9

This substance produce
H3O+ ions in water

Answer 9

acid

Question 10

This substance is a proton
acceptor

Answer 10

BASE

Question 11

This substance has one less
hydrogen and the charge
went down by one

Answer 11

CONJUGATE BASE

Question 12

This substance has one
more hydrogen and the
charge went up by one

Answer 12

CONJUGATE ACID

Question 13

5. What is Kw?

Answer 13

IONIC PRODUCT OF WATER

Question 14

What is Kw equal to @
25ºC?

Answer 14

1.0 x 10^-14

Question 15

What is the mathematical
relationship between pH
and pOH?

Answer 15

14 = pH + pOH

Question 16

If you have the pH of a
substance, what is the equation to find the [H3O+] ?

Answer 16

[H3O+] = 10^-pH

Question 17

How many strong acids?
Name them?

Answer 17

6 → HCl, HI, HBr, HClO3,
HNO3, H2SO4

Question 18

Which bases are the strong
bases?

Answer 18

GROUP 1 AND 2
HYDROXIDES

Question 19

What type of substance is
100% ionized

Answer 19

STRONG ACID/BASE

Question 20

What type of substance that
is not fully ionized?

Answer 20

WEAK ACID/BASE

Question 21

According to Bronsted
Lowry theory every acid
_____ a proton and forms a ____

Answer 21

DONATES, CONJUGATE
BASE

Question 22

According to Bronsted
Lowry theory every base
_____ a proton and forms a ____

Answer 22

ACCEPTS, CONJUGATE
ACID

Question 23

The larger the Ka the
___________the _________

Answer 23

STRONGER, ACID

Question 24

The smaller the Kb, the
____________ the __________

Answer 24

WEAKER , BASE

Question 25

Increased acid strength means the [H3O+] _________ and the pH _____

Answer 25

INCREASE, DECREASE

Question 26

Increased base strength means the [H3O+] _________ and the pH _________

Answer 26

DECREASE, INCREASE

Question 27

What is percentage ionization of a acid?

Answer 27

P = [H3O+ (aq)] / [HA (aq)] x100

Question 28

What is the mathematical relationship between an acid and it conjugate base?

Answer 28

Kw = Ka x Kb

Question 29

. The stronger the acid the _________ conjugate base.

Answer 29

weaker

Question 30

A strong acid and a weak base react to produce a _________ salt.

Answer 30

ACIDIC SALT

Question 31

A strong acid and a strong base reacts to give a ______ salt

Answer 31

NEUTRAL SALT

Question 32

A weak acid and a strong base produce a _________ salt

Answer 32

BASIC SALT

Question 33

A Weak acid and a weak base combine, the Ka is greater than the Kb. What type of salt is formed?

Answer 33

ACIDIC SALT

Question 34

What is an experiment where a known property of one solution is used to infer an unknown property of another solution

Answer 34

TITRATION

Question 35

If you have an acidic salt, what is the procedure for finding the pH of that salt?

Answer 35

FIND Ka, THEN [H3O+] THEN pH

Question 36

What is the equation for finding the pH of a weak acid?

Answer 36

[H3O+] =√Ka x [HA] pH = - LOG [H3O+]

Question 37

What is the equation for finding the pH of a weak BASE?

Answer 37

[OH-] = √Kb x [B] pOH = - LOG[OH-] pH = 14- pOH

Question 38

What is the substance of known concentration added from the burette

Answer 38

TITRANT

Question 39

A compound having a physical property (usually color) that changes abruptly near the equivalence point of a chemical reaction

Answer 39

INDICATOR

Question 40

What is the name of the graph of titrant volume on the x-axis and pH on the y-axis.

Answer 40

TITRATION CURVE

Question 41

What is the pH at equivalence point for a SA and SB titration ?

Answer 41

pH = 7

Question 42

What is the pH at equivalence point for a SA and WB titration ?

Answer 42

pH = 5 - 6

Question 43

What is the pH at equivalence point for a WA and SB titration ?

Answer 43

pH = 8 - 9

Question 44

At half the volume at the equivalence point, what is the pH equal to?

Answer 44

pH = PKA FOR WA

Question 45

What is the substance being analyzed, with unknown concentration?

Answer 45

ANALYTE

Question 46

What is the point in a titration at which the number of moles of acid and base are equal?

Answer 46

EQUIVALENCE POINT

Question 47

What is the point in a titration at which there is a sudden change in a physical property

Answer 47

END POINT

Question 48

Lewis acid

Answer 48

a substance that accepts an electron pair

Question 49

Lewis base

Answer 49

a substance that donates an electron pair