finals Flashcards
(354 cards)
may be prepared from any combination of solid,
liquid or gas, the three states of matter
Solutions
Liquid preparations that contain one or more soluble chemical substances dissolved in a suitable solvent or mixture of mutually miscible solvents
Solutions
Homogenous mixture that is prepared by dissolving a solid, liquid or gas in another liquid and represents a group of preparations in which the molecules of the solute or dissolved substance are dispersed
Solutions
TYPES OF SOLUTIONS
Solid Solution
Liquid Solution
Gaseous Solutions
the solvent is solid
the solvent is liquid
the solvent is gas
Solid Solution
Liquid Solution
Gaseous Solutions
SS - Solid in solid example
Cu + gold= 12 karat yellow gold
SS- Liquid in solid example
Hg dissolved in Ag = amalgam
SS- Gas in solid
air dissolved in soap = floating soap
LS- solid in liquid
salt in water
LS- ▪ Liquid in liquid
alcohol and water
LS- Gases in liquid
carbonated beverages
GS- Solid in gas
sulfur in air
GS- Liquid in gas
water vapor in air
GS- Gas in gas
oxygenated air
FACTORS AFFECTING THE “RATE” OF SOLUBILITY
Particle size
Agitation
Temperature
an increase in surface area to the solvent will _____ rate of solution. So the particle size should be reduced by_____ before it is dissolved
Increase
communition
increases the rate of solution by removing from the surface of the solute. The more concentrated solution around it the ___ concentrated the solvent.
less
FACTORS AFFECTING SOLUBILITY OF SOLUTE
Temperature
Molecular Structure
Effects of other substance
pH (weak acids, weak bases)
has the widest range of usefulness of all the solvents employed in pharmaceutical dispensing or manufacturing. It is a good solvent for most
inorganic and organic
Water
good solvent for many organic substances both natural and synthetic.
Alcohol USP, Ethyl Alcohol, Ethanol
Alcohol USP, Ethyl Alcohol, Ethanol limit for:
6 to 12 years old
12 years old and bove
Adult
0.5%
5%
10%
99.5% absolute alcohol is partially free from water
Dehydrated Alcohol
prepared by mixing equal volume of Alcohol USP and purified water
Diluted Alcohol NF
– contains about 70% of ethyl alcohol by volume the
remainder consists of water, denaturants with or without color additives and perfume oils and stabilizers
Alcohol, Rubbing