MIDTERMS REVIEWER

Question 1

What is the ratio of the mass of a substance to the mass of an equal volume of another substance taken as std?

Answer 1

SPECIFIC GRAVITY

Question 2

Mass of substance per unit volume.

Answer 2

DENSITY

Question 3

Unitless expression of the ratio of the mass of a substance (Ws) to the mass of an equal volume of another substance taken as standard (WW)

Answer 3

RELATIVE DENSITY/ SPECIFIC WEIGHT

Question 4

is always given first in defining the character of chemical liquids in the descriptive text of the USP

Answer 4

Specific gravity

Question 5

A very important variable in specific gravity determination.

Answer 5

TEMPERATURE

Question 6

Special glass bottles are used to determine the sp. gr. of liquids by weighing the defined volume. Available in volumes ranging from 1mL to 50mL.

Answer 6

SPECIFIC GRAVITY BOTTLE (PYCNOMETER)

Question 7

The scale relies on Archimedes Principle of buoyancy

Answer 7

MOHR WESTPHAL BALANCE

Question 8

For lighter liquids, the plummet will

Answer 8

SINK

Question 9

for the heavier liquids, it will

Answer 9

FLOAT

Question 10

The instrument was used to measure the density of a liquid as compared to that of water.

Answer 10

HYDROMETER

Question 10

The instrument was used to measure the density of a liquid as compared to that of water.

Answer 10

HYDROMETER

Question 11

The greater the density, the tighter or closer the molecules are packed inside the substance, therefore the greater the density/specific gravity of a liquid the higher a hydrometer will be buoyed by it. (T/F)

Answer 11

TRUE

Question 12

Two types of Hydrometer. Describe each.

Answer 12

Baume heavy hydrometer: liquids heavier than water

Baume light hydrometer: liquids lighter than water

Question 13

used for determining the percentage by the weight of sucrose.

Answer 13

Brix hydrometer

Question 14

 a characteristic of matter that is not associated with a change in its chemical composition.

Answer 14

PHYSICAL PROPERTY

Question 15

Solid - Liquid
Liquid - Gas
Solid - Gas
Liquid-Solid
Gas to solid 
Gas-Liquid

Answer 15

melting, evaporation, sublimation, solidification, deposition, condensation

Question 16

the temperature at which the solid and liquid forms of a pure substance can exist in equilibrium.

Answer 16

MELTING POINT

Question 17

The temperature at which a compound begins to melt and the temperature at which the compound is totally melted.

Answer 17

MELTING POINT RANGE