CHE2A Worksheet 5B PDF

Title	CHE2A Worksheet 5B
Author	James Jirachaiskul
Course	General Chemistry
Institution	University of California Davis
Pages	4
File Size	201.2 KB
File Type	PDF
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Summary

Worksheet 5B from CHE2A 2020W....

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Week 5B Worksheet 1. Write a plausible Lewis structure for each of the following molecules: a. FCl

b. CH3CHO

c. HOClO

d. CO32-

2. What is wrong with the following Lewis structure? Replace it with a more acceptable structure.

3. Assign formal charges to the atoms in these structures: a. Si in SiF62-

b. Cl in ClF3

Week 5B Worksheet 4. Which of the following do you expect to be polar? a. HCN

b. C2H4

c. SiF4

5. Draw Lewis structures for the following molecules, then use VSEPR theory to predict the electron shape and molecular shape of each a. PCl3

b. SO42-

c. SOCl2

d. ICl3

e. BrF4+

Week 5B Worksheet The following two pages contain conversions, constants, equations, and a periodic table which may be useful to you. You may remove them for easy access. Conversions: 1 atm = 760 Torr = 760 mmHg = 101,325 Pa

1010 Å = 1 m = 1012 pm = 100

cm 1.00 in = 2.54 cm

1 cm3 = 1 mL

101.325 J = 1 L atm

1 lb = 453.6 g

1 cal = 4.184 J

1 gal = 3.785 L

T(K) = t(°C) + 273.15

t(°F) =9/5 t(°C) + 32

Constants: R = 8.3145 J / mol K = 0.08206 L atm / mol K

c = 2.9979 x 108 m / s

h = 6.626 x 10–34 J s

g = 9.81 m / s

NA = 6.022 x 1023 mol–1

d (H2O) = 1.00 g / cm3

m(electron) = 9.109 x 10–31 kg

RH = 2.178 x 10–18 J

m(proton) = 1.673x10-27 kg

Equations:

n = m/M

d=

m V

M=

n V

P = dhg

E = h

=

c

=

h h = p mu

PV = nRT

2 urm s = u =



 n 2a   P + 2  (V − nb ) = nRT V  

3RT M

Ptotal =  Pi

xp 

i

h 4

En = - Z2RH/n2

PiVi/Ti = PfVf/Tf

Zeff = Z − S

ΔE = Z2RH(1/ni2 – 1/nf2)

d = P(MM)/(RT)

ΧA = nA/ntotal

KE = ½mu2 = 3/2RT

rateA/rateB = (MMB/MMA)1/2

φ = hν

KE = hν – φ

tB/tA = (MMB/MMA)1/2

λ = h/p

p = mu

Ѱn(x) = (2/L)1/2sin(nπx/L)

P1/T1 = P2/T2

M1V1 = M2V2

V1/T1 = V2/T2

P1V1 = P2V2

Week 5B Worksheet Solubility Rules: 1. Salts of group 1 cations (with some exceptions for Li+) and the NH4+ cation are soluble 2. Nitrates, acetates, and perchlorates are soluble 3. Salts of silver, lead, and mercury(I) are insoluble 4. Chlorides, bromides, and iodides are soluble 5. Carbonates, phosphates, sulfides, oxides, and hydroxides are insoluble (sulfides of group 2 cations and hydroxides of Ca2+, Sr2+, and Ba2+ are slightly soluble) 6. Sulfates are soluble except for those of calcium, strontium, and barium PERIODIC TABLE Key

Atomic Number Symbol Atomic Mass Electronegativity

1

H

2

He

1.008 2.20 3

4

5

6

7

8

Li

Be

B

C

N

O

F

Ne

6.941 0.98

9.012 1.57

10.81 2.04

12.01 2.55

14.01 3.04

16.00 3.44

19.00 3.98

20.18 -

9

4.003 10

11

12

13

14

15

16

17

18

Na

Mg

Al

Si

P

S

Cl

Ar

22.99 0.93 19

24.31 1.31 20

21

22

23

24

25

26

27

28

29

30

26.98 1.61 31

28.09 1.90 32

30.97 2.19 33

32.06 2.58 34

35.45 3.16 35

39.95 36

K

Ca

Sc

Ti

V

Cr

Mn

Fe

Co

Ni

Cu

Zn

Ga

Ge

As

Se

Br

Kr

39.10 0.82

40.08 1.00

44.96 1.36

47.90 1.54

50.94 1.63

52.00 1.66

54.94 1.55

55.85 1.83

58.93 1.88

58.70 1.91

63.55 1.90

65.38 1.65

69.72 1.81

72.59 2.01

74.92 2.18

78.96 2.55

79.90 2.96

83.80 -

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

Rb

Sr

Y

Zr

Nb

Mo

Tc

Ru

Rh

Pd

Ag

Cd

In

Sn

Sb

Te

I

Xe

85.47 0.82 55

87.62 0.95 56

88.91 1.22 71

91.22 1.33 72

92.91 1.6 73

95.94 2.16 74

(98) 1.9 75

101.1 2.2 76

102.9 2.28 77

106.4 2.20 78

107.9 1.93 79

112.4 1.69 80

114.8 1.78 81

118.7 1.96 82

121.8 2.05 83

127.6 2.1 84

126.9 2.66 85

131.3 86

Cs

Ba

Lu

Hf

Ta

W

Re

Os

Ir

Pt

132.9 0.79 87

137.3 0.89 88

175.0 1.27 103

178.5 1.3 104

180.9 1.5 105

183.9 2.36 106

186.2 1.9 107

190.2 2.2 -

192.2 2.20 109

195.1 2.28

Fr

Ra

Lr

Unq

Unp

Unh

Uns

(223) 0.7

(226) 0.9

(260) -

-

-

-

-

Au

Hg

Tl

Pb

Bi

Po

At

Rn

197.0 2.54

200.6 2.00

204.4 2.04

207.2 2.33

209.0 2.02

(209) 2.0

(210) 2.2

(222) -

Une -

57

58

59

60

61

62

63

64

65

66

67

68

69

70

La

Ce

Pr

Nd

Pm

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

138.9 1.10

140.1 1.12

140.9 1.13

144.2 1.14

(145) 1.13

150.4 1.17

152.0 1.2

157.3 1.20

158.9 1.2

162.5 1.22

164.9 1.23

167.3 1.24

168.9 1.25

173.0 1.1 102

89

90

91

92

93

94

95

96

97

98

99

100

101

Ac

Th

Pa

U

Np

Pu

Am

Cm

Bk

Cf

Es

Fm

Md

No

(227) 1.1

232.0 1.3

(231) 1.5

238.0 1.38

(237) 1.36

(244) 1.28

(243) 1.3

(247) 1.3

(247) 1.3

(251) 1.3

(252) 1.3

(257) 1.3

(258) 1.3

(259) 1.3...