Chapter 7 - Basics Of Chemistry Flashcards Preview

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Flashcards in Chapter 7 - Basics Of Chemistry Deck (37):
1

TF you will learn how to layer products

True

2

What is an example of an organic substance?

Plastic

3

TF inorganic substances are flammable

False

4

The simplest form of chemical matter

Element

5

How are elements identified?

Letter symbols

6

TF Atoms of each element are different in structure from the atoms of all other elements

True

7

These have a definite size and definite shape

Solids

8

These have a definite size but not a definite shape

Liquids

9

These have neither a definite size nor a definite shape

Gas

10

Characteristics that can be determined without a chemical reaction and that do not cause a chemical change in the identity of the substance

Physical properties

11

Characteristics that can be determined only with a chemical reaction and that cause a chemical change in the identity of the substance

Chemical properties

12

A change in the form or physical properties of a substance without the formation of a new substance

Physical change

13

Combination of two or more substances that are united physically, in any proportions with combined properties

Physical mixture

14

What state of mater is liquid

Serum

15

The most abundant element found on earth

Oxygen

16

Airs volume consists of what?

1 part oxygen and 4 parts nitrogen

17

What is the most commonly used cosmetic ingredient?

Water

18

What is the range of the pH scale?

0-14

19

What does pH stand for?

Potential hydrogen

20

Creates a pair of ions with opposite electrical charges

Ionization

21

Also known as bases, have a pH above 7.0

Alkalis

22

Substances with a pH below 7.0

Acids

23

What turns litmus paper from red to blue

Bases

24

Changes x10

Logarithmic scale

25

A pH of 8 is how much more alkaline than a pH of 7

10 times

26

Chemical reaction in which the oxidizing agent is reduced and the reducing agent is oxidized

Redox reaction

27

Rapid oxidation of substance, accompanied by the production of heat and light

Combustion

28

What is true of suspensions

They are slightly miscible

29

Uniform mixture of two or more substances

Solution

30

Unstable mixture of two or more immiscible substances

Suspension

31

TF suspensions contain smaller particles than solutions do

False

32

When properly stored how long can an emulsion be stable for?

3 years

33

These are used to emulsify oil and water

Surfactants

34

TF O/W emulsions are easily rinsed away with water

True

35

What is an example of an O/W emulsion

Moisturizing lotion

36

Droplets of oil dispersed in water with the aid of an emulsifying agent

Oil in water emulsion

37

Droplets of water dispersed in an oil

Water in oil emulsion