Density and Specific Gravity Flashcards
Defined as mass per unit volume
Density
Density of water
1 g/cc
how is density expressed
grams per cubic meter
Ratio expressed decimally of the weight of a substance to the weight of an equal volume of a substance chosen as a standard
specific gravity
the weight of a substance relative to the weight of a standard
Specific Gravity
concrete number
density
Units measure varies
Density
Density of water may be expressed as 1 g/ml, 1000g/L, or ____________lb/cu. ft
62.5lb/cu. ft
Abstract number (Ratio of like quantities)
Specific gravity
No unit
Specific Gravity
What is the specific gravity of water
1
A special glass bottle used to determine the specific gravity
Pycnometer or specific gravity bottle
Preparation of total parenteral nutrition (TPN) admixtures
Pharmaceutical applications
True or False: specific Gravity is an important factor in urinalysis of adults
True
Enumerate the percentage strengths
% w/v, % v/v and % w/w
Expressed the number of milligrams of a substance in 100ml of a liquid
Milligrams percent
occasionally to denote the concentration of a drug or natural substance in a biological fluid, as in the blood
Milligrams percent
Used for the strengths of very dilute solutions
Parts per million or parts per billion
Methods for reducing or enlarging formulas
Ratio and proportions
Dimensional analysis
Factor Method: Simplest method
Pharmaceutical Applications
Convert the weight of an ingredient or preparation to volume or vice versa.
Calculate the equivalent strength of a preparation on the basis of either
weight or volume.
Preparation of total parenteral
nutrition (TPN) admixtures.
In normal adults, the specific
gravity of urine is usually within the range of
1.010 and 1.025
Clinical applications
Specific gravity is an important factor in urinalysis.
