Chemistry Exam 1

Front 1

Ca2+ and C2O42-

Back 1

CaC2O4

Hint 1

Calcium oxalate

Front 2

Al3+ and H2PO4-

Back 2

Al(H2PO4)3

Hint 2

Aluminum hydrogen phosphate

Front 3

K+ and MnO4-

Back 3

KMnO4

Hint 3

Potassium permanganate

Front 4

Fe2+ and NO3-

Back 4

Fe(NO3)2

Hint 4

Iron (II) nitrate

Front 5

Na+ and CN-

Back 5

NaCN

Hint 5

Sodium cyanide

Front 6

Lithium perchlorate

Back 6

LiClO4

Hint 6

Li+, ClO4+

Front 7

Magnesium peroxide

Back 7

MgO2

Hint 7

Mg2+, O-

Front 8

Manganese(II) sulfide

Back 8

MnS

Hint 8

Mn2+, S2-

Front 9

Ammonium thiocyanate

Back 9

NH4SCN

Hint 9

NH4+. SCN-

Front 10

Tin (II) oxide

Back 10

SnO

Hint 10

Sn2+, O2-

Front 11

Tin (IV) oxide

Back 11

SnO2

Hint 11

Sn4+, O2-

Front 12

Sodium hypochlorite

Back 12

NaClO

Hint 12

Na+, ClO-

Front 13

Rubidium sulfate

Back 13

Rb2SO4

Hint 13

Rb+, SO42-

Front 14

Calcium carbonate

Back 14

CaCO3

Hint 14

Ca2+, CO32-

Front 15

NF3

Back 15

Nitrogen trifluoride

Front 16

NO2

Back 16

Nitrogen dioxide

Front 17

S2F10

Back 17

Disulfur decafluoride

Front 18

PCl3

Back 18

Phosphorus trichloride

Front 19

CO2

Back 19

Carbon dioxide

Front 20

Phosphorus pentachloride

Back 20

PCl5

Front 21

Dinitrogen monoxide

Back 21

N2O

Front 22

Sulfur dichloride

Back 22

SCl2

Front 23

Xenon trioxide

Back 23

XeO3

Front 24

Diphosphorus tetrafluoride

Back 24

P2F4

Front 25

H3PO4

Back 25

Phosphoric Acid

Front 26

Hydroiodic acid

Back 26

HI

Front 27

HCN

Back 27

Hydrocyanic Acid

Front 28

Nitrous acid

Back 28

HNO2

Front 29

Perchlorate ion

Back 29

ClO4-

Front 30

ClO2-

Back 30

Chlorite ion

Front 31

Sulfate ion

Back 31

SO42-

Front 32

NH4+

Back 32

Ammonium ion

Front 33

Acetate ion

Back 33

C2H3O2-

Front 34

Cr2O72-

Back 34

Dichromate ion

Front 35

Oxalate ion

Back 35

C2O42-

Front 36

CH3COO -

Back 36

Acetate

Hint 36

C2H3O2 -

Front 37

CN -

Back 37

Cyanide

Front 38

OH -

Back 38

Hydroxide

Front 39

ClO -

Back 39

Hypochlorite

Front 40

ClO2 -

Back 40

Chlorite

Front 41

ClO3 -

Back 41

Chlorate

Front 42

ClO4 -

Back 42

Perchlorate

Front 43

NO2 -

Back 43

Nitrite

Front 44

NO3 -

Back 44

Nitrate

Front 45

MnO4 -

Back 45

Permanganate

Front 46

CO3 2-

Back 46

Carbonate

Front 47

HCO3 -

Back 47

Hydrogen carbonate (or bicarbonate)

Front 48

CrO4 2-

Back 48

Chromate

Front 49

CrO7 2-

Back 49

Dichromate

Front 50

O2 2-

Back 50

Peroxide

Front 51

PO4 3-

Back 51

Phosphate

Front 52

HPO4 2-

Back 52

Hydrogen Phosphate

Front 53

H2PO4 -

Back 53

Dihydrogen phosphate

Front 54

SO3 2-

Back 54

Sulfite

Front 55

Cu+

Back 55

Copper (I)

Hint 55

Cuprous

Front 56

Cu2+

Back 56

Copper (II)

Hint 56

Cupric

Front 57

Hg 2+

Back 57

Mercury (II)

Hint 57

Mercuric

Front 58

Cr3+

Back 58

Chromium (III)

Hint 58

Chromic

Front 59

Fe2+

Back 59

Iron (II)

Hint 59

Ferrous

Front 60

Fe3+

Back 60

Iron (III)

Hint 60

Ferric

Front 61

Pb2+

Back 61

Lead (II)

Front 62

Sn2+

Back 62

Tin (II)

Hint 62

Stannous

Front 63

Binary acids:

Back 63

Hydrogen + Nonmetal

Hint 63

hydro- + nonmetal root
+ suffix -ic + acid

Front 64

Alkanes

Back 64

Methane(CH4) Ethane(C2H6)
Propane(C3H8) Butane(C4H10)
Pentane, Hexane, Heptane, Octane, Nonane, Decane

Hint 64

Carbon & Hydrogen

Front 65

37.20g to kg

Back 65

(37.20g)(1kg/1,000g) =

Hint 65

0.03720kg

Front 66

1 km

Back 66

1,000 m

Hint 66

100,000 cm

Front 67

1 kg

Back 67

1,000 g

Hint 67

1.000,000 mg

Front 68

1 m

Back 68

100 cm

Hint 68

1,000 mm

Front 69

1 L

Back 69

1,000 mL

Front 70

1.00 g/mL density H2O; how many grams each

Back 70

(2.56mL H20) (1.00g/mL) =
2.56g H2O

Hint 70

(2.56g H20) (16.00g O/18.02g H20) =
2.27g O atoms

Front 71

K3N

Back 71

Potassium Nitride

Front 72

Diboron trioxide

Back 72

B2O3

Front 73

Ca(ClO3)2

Back 73

Calcium chlorate

Front 74

HNO3

Back 74

Nitric Acid

Front 75

Magnesium Acetate

Back 75

Mg(C2H3O2)2

Front 76

Lithium Carbonate

Back 76

Li2CO3

Front 77

Copper (I) sulfide

Back 77

Cu2S

Front 78

ICI2

Back 78

Iodine Dichloride

Front 79

6.00g sample compound with C, H, O is burned to produce 8.62g of CO2 and 3.65g of H2O. Determine empirical formula.

Back 79

(Total g) (total C mass / total CO2 mass)
(8.62gCO2)(12.01gC/44.01CO2) = 2.35gC
(3.65gH2O)(2.016gH / 18.02g H2O) = 0.408gH

Hint 79

6.00 total
-2.35g C
-0.408g H
= 3.242g O

Front 80

XBr2-. X has mass number of 230 and 80 electrons. How many neutrons and which symbol for a possible isotope of this element?

Back 80

X+2 since it reacts with 2Br-
82 e- in neutral atom but +2 = 80 electrons. 82p = Pb
230-82 = 148 N

Hint 80

206
Pb
82

Front 81

Mass (A) & Atomic (Z) numbers

Back 81

Mass number (A): total protons and neutrons; isotopes have different atomic number than mass number

Hint 81

Atomic number (Z): number of protons

Front 82

Molar mass:

Back 82

sum of atomic masses of all atoms present

Front 83

Law of Constant Composition:

Back 83

Any particular compound is composed of the same elements in the same parts by mass (matter cannot be created nor destroyed).

Hint 83

Calcium carbonate:
8g calcium, 2.4g carbon, 9.6g oxygen = 20.0g
.40 calcium, .12 carbon, .48 oxygen = 1.00 parts by mass
40% calcium, 12% carbon, 48% oxygen = 100% by mass