Chemistry Need To Remember

Question 1

Oxygen properties

Answer 1

1. Support combustion of other substance
2. Necessary for respiration

Question 2

Water characteristic

Answer 2

1. Vital for biological process
2. Common solvent for many substances

Question 3

Carbon monoxide characteristic

Answer 3

1. Produced from incomplete combustion
2. Highly toxic

Question 4

Methane characteristic

Answer 4

1. Primary component of natural gas
2. Greenhouse gas contributing to global warming

Question 5

Helium

Answer 5

1. Colorless, odorless, tasteless
2. Present in trace amount
   3, used in inflating balloons

Question 6

Hydrogen

Answer 6

1. Lightest
2. Does not generate air pollutants
3. High energy output, potential future energy source

Question 7

Nitrogen

Answer 7

1. Constitute 78%of earth;s atmosphere
2. Chemically inert

Question 8

Carbon dioxide

Answer 8

1. Denser than air
2. Sublimates from solid to gas at standard pressure

Question 9

Ammonia

Answer 9

1. Gas with strong odor
2. Highly soluble in water
3. Used in dyes and fertilizer
4. Effective coolant to high latent heat of vaporization

Question 10

Hydrogen chloride

Answer 10

1. Highly toxic gas
2. Readily dissolve in water

Question 11

Hydrogen ion

Answer 11

H⁺

Question 12

Sodium ion

Answer 12

Na⁺

Question 13

Potassium ion

Answer 13

K⁺

Question 14

Ammonium ion

Answer 14

NH₄⁺

Question 15

Magnesium ion

Answer 15

Mg²⁺

Question 16

Calcium ion

Answer 16

Ca²⁺

Question 17

Copper ion

Answer 17

Cu²⁺

Question 18

Iron ion

Answer 18

Fe²⁺

Question 19

Chloride ion

Answer 19

Cl^-

Question 20

Fluoride ion

Answer 20

F^-

Question 21

Hydroxide ion

Answer 21

OH ^-

Question 22

Nitrate ion

Answer 22

NO₃^-

Question 23

Oxide ion

Answer 23

O^2-

Question 24

Sulfide ion

Answer 24

S^2-

Question 25

Sulfate ion

Answer 25

SO₄ ^2-

Question 26

Carbonate ion

Answer 26

CO₃^2-

Question 27

Sodium ion

Answer 27

Na⁺

Question 28

Magnesium ion

Answer 28

Mg²⁺

Question 29

Potassium ion

Answer 29

K⁺

Question 30

Calcium ion

Answer 30

Ca²⁺

Question 31

Chloride ion

Answer 31

Cl^-

Question 32

Oxide ion

Answer 32

O^2-

Question 33

Fluoride ion

Answer 33

F^-

Question 34

Sulfide ion

Answer 34

S^2-

Question 35

Cooper ion

Answer 35

Cu²⁺

Question 36

Ammonium ion

Answer 36

NH₄⁺

Question 37

Iron ion

Answer 37

Fe²⁺

Question 38

Silver ion

Answer 38

Ag⁺

Question 39

Hydroxide ion

Answer 39

OH^-

Question 40

Sulfate ion

Answer 40

SO ₄^2-

Question 41

Nitrate ion

Answer 41

NO ₃^-

Question 42

Carbonate ion

Answer 42

CO ₃^2-

Question 43

Ionic compound Sodium chloride

Answer 43

NaCl

Question 44

Ionic compound Potassium fluoride

Answer 44

KF

Question 45

Magnesium sulfide

Answer 45

MgS

Question 46

Calcium Oxide

Answer 46

CaO

Question 47

Copper hydroxide

Answer 47

Cu (OH)₂

Question 48

Iron nitrate

Answer 48

Fe(NO ₃) ₂

Question 49

Ammonium sulfide

Answer 49

(NH₄)₂SO₄

Question 50

Silver carbonate

Answer 50

Ag₂CO₃

Question 51

전해질 영어로

Answer 51

electrolyte

Question 52

What color is copper ion

Answer 52

Blue

Question 53

What color is permanganate ion

Answer 53

Purple

Question 54

Copper sulfate formula

Answer 54

Cu ²⁺ + SO₄^2-

Question 55

Potassium permanganate formula

Answer 55

K⁺+ MnO_4-

Question 56

The four precipitates

Answer 56

1. AgCl 2. PbI₂ 3. CaCO₃ 4. BaSO₄