1

Question 1

It is defined as mass per unit volume at a fixed temperature and pressure

Answer 1

Density

Question 2

how is density expressed in CGS system?

Answer 2

g/cm*3

Question 3

How is density is expressed in the SI unit

Answer 3

kg/m*3

Question 4

Centimeter
Gram
Second

Answer 4

CGS

Question 5

Meter
Kilogram
Second

Answer 5

SI

Question 6

Ratio of a mass of a substance to the mass of an equal volume of another stance chosen or taken as a

Answer 6

Specific Gravity

Question 7

Formula for Sp.Gr

Answer 7

Ddrug/DH20 (usually standard ang water)

Question 8

how is specific gravit determined in liquids?

Answer 8

Flotation method

Question 9

The specific gravity of a liquid maybe determined with the aid of a?

Answer 9

pycnometer
hydrometer
Mohr-Westphal balance

Question 10

Two types of pycnometer

Answer 10

ordinary
leach

Question 11

For liquid and solid

Answer 11

Pycnometer

Question 12

Pycnometer with thermometer

Answer 12

Leach pycnometer

Question 13

follow principle of bouyance/buoyant effect

Answer 13

Flotation method

Question 14

Constant weight, Variable depth of immersion of hydrometer-multiple calibration

Answer 14

hydrometer

Question 15

for light <1g/ml; heavy >1g/mL

Answer 15

Baume hydrometer

Question 16

Tralle’s hydrometer

Answer 16

Alcoholometer

Question 17

what hydrometer measure the constant weight, Variable depth of immersion of hydrometer - multiple calibration

Answer 17

Baume Hydrometer
Alcoholometer
Twadell’s hydrometer
Cartier’s hydrometer

Question 18

what are the hydrometer that pertains the constant depth of immersion variable weight of hydrometer

Answer 18

Nicholson’s hydrometer
Fahrenheit hydrometer
Lovis bead

Question 19

balloon shaped halo globe of glass with different sizes and weight with specific gravity values scratch on their side

Answer 19

Lovis bead

Question 20

Fischer Davidson Gravitometer

Answer 20

Manometric method

Question 21

a very convenient device for taking the specific gravity of liquids

Answer 21

Mohr-Westphal balance

Question 22

The plimmet (occupying 5mL) suspended from the beam of balance is immersed in the liquid to be tested, in which the plummet is subject to a buoyant effect equivalent to the weight of fluid.

Answer 22

Principle of Mohr-Westphal balance

Question 23

is measured by placing various weight on the notched beam of the balance to effect submersion of the plummet to a constant reference point

Answer 23

Buoyant force

Question 24

it is the exert on the plummet is equal to the weight of the liquid displaced

Answer 24

Buoyant effect

Question 25

What is the principle used in the specific gravity determination of solid pycnometer method

Answer 25

Loss of weight or displacement

Question 26

is used for most determination of specific gravity of liquid

Answer 26

pycnometer or specific bottle

Question 27

It maybe ysed in taking specific gravity of solid substances which are small fragments or even in a much finer route of subdivision

Answer 27

Pycnometer

Question 28

to compute for the specificgravity,what is itsformula

Answer 28

Specific gravity = weight of sample/ weight of standard displaced by solid (spgr of substance)

Question 29

Weight solid immersed in water

Answer 29

Hydrostatic balance

Question 30

what is the formula for getting the spgr on hydrostatic balance

Answer 30

spgr = weight of sample/weight of equal volume water

Question 31

What is the formula for specific gravity if solid heavier than and insoluble in water

Answer 31

Spgr = weight of sample in air/weight sample in air - weight of sample in water

Question 32

What is the formula if solid heavier than and soluble in water

Answer 32

spgr = weight of sample in air/ weight of sample in air - weight of sample in std liquid x (spgr of standard liquid

Question 33

Post lab question 1:

the principle involve in specific gravity determination for liquid is buoyant force measured by placing various weights on the notched beam of the balance to effect submersion of the plummet to a constant reference point. Weight displacement is also involved

Question 34

Post lab question 2:
Specific gravity is the ratio of the substance to the mass of an equal volume of another substance chosen or taken as a standard

Question 35

Post lab question 3:

Density vs. Specific Gravity

Density:
Concrete Number
Must Vary with the table of measurement
Water maybe variously expressed

Specific Gravity
Ratio between like quantities
Has no dimension therefore a constant value for each subs
H20=1

Question 36

Post lab question 4:

Methods of determining the specific gravity

Solid
- Pycnometer method (ordinary)
- Hydrostatic balance method
- Graduated cylinder
- Immersion of solid in transparent liquid

Liquid:
Pycnometer method (leach)
Flotation method
Manometric method