Chapter7-Basis Of Chemistry Flashcards
What causes oxidation ?
Addition of oxygen or a loss of hydrogen
What has physical properties that we can see, smell, taste, and touch ?
Matter
What is an ion ?
An atom or molecule that carries an electric charge .
What is an atom win a positive electrical charge ?
Cation
What is an ion with a negative charge ?
Anion
What is united with the aid of an emulsifier to create an emulision ?
2 or more immiscible substances .
What is a solution ?
Uniform mixture of 2 or more mutually missable substances.
What is air ?
Gaseous mixture that makes up the earths atmosphere.
What is true of liquid ?
It is matter with fixed volume but no definite shape.
What’s is true of oxygen ?
It is the most abundant element on earth.
What is true of water ?
It is the most abundant of all substances on earth .
What is true of elements ?
Elements are the simplest form of matter
What is the difference between water in oil emulsions (W/O) and oil in water emulsions (O/W) ?
W/O emulsions are greasier.
What term means water loving ?
Hydrophilic
How much of the air is made up of nitrogen ?
Four-fifths
What are the two branches of chemistry ?
Organic and inorganic
What element is found in all living things wether they are plant or animal ?
Carbon
What is a substance that is dissolved by a solvent to form a solution ?
Solute
What do antioxidants prevent by neutralizing free radicals ?
Oxidation
What term refers to substances with a pH below 7.0 ?
Acids
What are surfactants ?
Unstable mixtures of two or more immiscible substances
What is reduction ?
Loss of oxygen or the addition of hydrogen .
Hi w much of the earths surface, approximately is water ?
75 percent
