Chem 7-9

Question 1

It is a homogenous mixture of two or more substances.

Answer 1

Solution

Question 2

The dissolving substance,

Answer 2

solvent.

Question 3

The substance being dissolved in the solvent

Answer 3

solute.

Question 4

is the Latin term for water

Answer 4

Aqua

Question 5

When water is the solvent we say it is an

Answer 5

aqueous solution

Question 6

the molecules or ions are so small (less
than 1 nm) that they cannot be seen and will remain dispersed in the liquid.

Answer 6

true solution

Question 7

the solvents has only a small quantity of solute dissolved in it

Answer 7

Dilute solution

Question 8

that are used in the clinical laboratory
are purchased from laboratory supply houses

Answer 8

Concentrated acids

Question 9

the clinical laboratory, “water” always refers to

Answer 9

distilled water.

Question 10

It is the number of moles of solute per Kg of solvent

Answer 10

Molality

Question 11

one mole of solute plus 1000 ml of solvent

Answer 11

Molality

Question 12

a hydrogen ion donor

Answer 12

An acid

Question 13

hydrogen ion acceptor or recipient.

Answer 13

base

Question 14

is always one of the products of a reaction between an
acid and a base

Answer 14

Water

Question 15

is formed by the positive ion
of a base and the negative ion of
an acid.

Answer 15

A salt

Question 16

Reaction between an acid and a
base

Answer 16

Neutralization reaction:

Question 17

contains an excess of hydrogen ions (H+).

Answer 17

An acid solution

Question 18

contains an excess of hydroxyl ions (OH-
)

Answer 18

A basic solution

Question 19

have an equal number of H+ and OH

Answer 19

Neutral solution:

Question 20

devised a scale for telling us the acidity or
alkalinity of a solution

Answer 20

, Sorenson

Question 21

scale for telling us the acidity or
alkalinity of a solution.

Answer 21

pH scale

Question 22

pH is read as

Answer 22

potency of hydrogen ion.

Question 23

pH is a measure of

Answer 23

the hydrogen ion concentration of a
solution.

Question 24

the amount of solute per liter of
solution.

Answer 24

Concentration

Question 25

The equilibrium constant corresponding to the ionisation of an acid is known as the

Answer 25

ionisation constant

Question 26

The strength of a base is its ability to react with proton.

Answer 26

Kb (basicity constant).

Question 27

are chemicals that change colour with change in hydrogen ion concentration.

Answer 27

Indicators

Question 28

: Substances that prevent pH changes in a solution

Answer 28

Buffers

Question 29

: A solution that resists changes in pH as a result of addition of small amounts of acid or alkali.

Answer 29

Buffer solution

Question 30

The resistance of a solution to changes in pH upon addition of small amounts of acid or alkali.

Answer 30

Buffer Action:

Question 31

is composed of a weak acid and the salt formed when the weak acid reacted with a strong base

Answer 31

A buffer pair

Question 32

The number of moles of strong acid or strong base required to change the pH of one litre of the buffer solution by one pH unit

Answer 32

Buffer Capacity:

Question 33

Solutions of weak acid and a salt of the weak acid

Answer 33

(Acidic Buffers)

Question 34

Solutions of a weak base and a salt of the weak base

Answer 34

(Basic Buffers)

Question 35

Decrease in the basic (B) portion of the buffer system.

Answer 35

Acidosis

Question 36

Increase in the basic portion of the buffer.

Answer 36

Alkalosis