Unit 2: Chapters 5,6,8,9 Flashcards Preview

CHEM 120 SUMR'DONE > Unit 2: Chapters 5,6,8,9 > Flashcards

Flashcards in Unit 2: Chapters 5,6,8,9 Deck (21)
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1

Moles are usually used to calculate

molar mass

2

Mole equation

1 mole = 6.022 × 10^23 items

3

Molar mass =

mass of 1 mole of a substance in g/mol

4

Mass percent =

mass of element / total mass compound × 100%

5

Combustion

reaction with O2

6

Combination (a.k.a. synthesis)

one product

7

Decomposition

one reactant

8

Single displacement

one element + one ionic compound reactants

9

Double replacement

2 ionic compounds as reactants

10

Oxidized is

when an element loses electrons

11

Reduced is

when an element gains electrons

12

Oxidizing agent (oxidant) is

The species thats being...

the species in a reaction that causes another one to be oxidized

The species thats being reduced

13

Reducing agent (reductant) is

The species that’s being...

the species in a reaction that causes another one to be reduced

The species that’s being oxidized

14

Highest electronegative element

F

15

Bond polarity is

The (larger/smaller) the difference, the (more/less) polar the bond

The difference between the two electronegative values

The larger the difference, the more polar the bond

16

Nonpolar covalent bond
Electronegativity difference:
Electrons shared:

0.0-0.4
Electrons shared equally

17

Polar Covalent bond
Electronegativity difference:
Electrons shared:

0.5-1.8
Electrons shared unequally

18

Ionic interaction
Electronegativity difference:
Electrons shared:

1.9-3.3
Electrons transferred

19

Transfer of electrons
Bond?

ionic interaction

20

Unequal-sharing of electrons
Bond?

polar covalent bond

21

Equal-sharing of electrons
Bond?

nonpolar covalent bond