Chemistry
pH
emulsions
States
misc
100
_________ Makes up 65% of the human body and covers 75% of the earths surface
Water
100
the pH scale goes from 0-14 with _________ being neutral
7
100
In an oil-in-water emulsionL
droplets of oil aer dispersed in water.
100
A __________occures when ice melts and forms water OR when water turn into steam
Change of State
100
____________mixtures of two or more substances make up solutions, suspensions and emulsions.
physical
200
A ___________ is made up of two or more atoms that are chemically joined together
Molecule
200
__________include skin cleansers, moisturizers, and body washes
Oil-in-Water Emulsions
200
Solutions suspensions and emulsions are physical mixtures of __________(how many) substances
2 or more
200
the three states of metter are:
Solid, liquid, and gas.
200
Physical properties of a substance include what?
color, odor, and weight, density and specific gravity, melting point, boiling point, and hardness.
300
how do antioxidants prevent oxidation?
Neutralize the free radical
300
The relative degree of _________ is the potential hydrogen (pH) of a substance.
Acidity or alkalinity
300
Why are surfactants necessary in skin care preparations?
Wet the skin, disperse oil in water, emulsify oil and water
300
A change in the state of a substance without the formation of a new substance is called:
physical change
300
Suspentions are __________ of two or more substances
uniform mixtures
400
Rusting iron and burning wood are examples of changes in:
Chemical properties
400
Anything below 7 on the pH scale is considered.
Neutral
400
describe and oil-in-water emulsion
oil added to water.
400
describe a solid
Definite size and definite shape
400
What branch of chemistry includes substances that contain carbon?
Organic
500
A chemical change is a change in the:
Chemical composition of a substance.
500
What is considered the building blocks of proteins?
amino Acids
500
Water in oil emulsions are ______ than oil-in-water emulsions.
Greasier, more resistant, and Heavier.
500
Describe a liquid
Definite size, but not a definite shape.
500
Silver, gold, carbon, hydrogen, and sodium are all examples of what?
elements
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