Data Booklet for Chemistry (Advanced Level)

9746 H2 CHEMISTRY (2008)

Data Booklet for Chemistry (Advanced Level)

TABLES OF CHEMICAL DATA

Important values, constants and standards

molar gas constant

R

= 8.31 J K" mo!"'

the Faraday constant

F

= 9.65 x 10'C mor'

the Avogadro constant

L

= 6.02

the Planck constant

h

= 6.63 X 10,34 J s

speed of light in a vacuum

c

= 3.00 x 10' m s"

rest mass of proton, : 1-1

mp

= 1.67

X

10,27 kg

rest mass of neutron, ,',11

mn

= 1.67

X

10,27 kg

rest mass of electron, _~e

me

= 9.11

X

10,31 kg

electronic charge

e

=,1.60x lO"'C

molar volume of gas

Vm

= 22.4 dm' mol" at s.l.p.

X

10" mol"

Vm

= 24 dm' mol" under room conditions

(where s.t.p. is expressed as 101 kPa, approximately, and 273 K (0 ¡ãC))

ionic product of water

= 1.00

X

10,14 mol' dm"

(at 298 K 125 ¡ãCD

specific heat capacity of water

=4.18kJk "K"

(= 4.18 J g.9 K")

35

9746 H2 CHEMISTRY 12008)

Ionisation encrgies (1st, 2nd, 3rd and 4th) of selectcd elemcnts, in kJ mol-'

Proton

Number

H

First

Sccond

Third

Fourth

1310

He

2

2370

5250

Li

3

519

7300

11800

Be

'I

900

1760

14800

21000

13

5

799

2420

3660

25000

C

6

1090

2350

4610

6220

N

7

1400

2860

4590

7480

0

8

1310

3390

5320

7450

F

9

1680

3370

6040

8410

Ne

10

2080

3950

6150

9290

Na

11

494

4560

6940

9540

Mg

12

736

1450

7740

10500

AI

13

577

1820

2740

11600

Si

14

786

1580

3230

4360

P

15

1060

1900

4960

S

16

1000

2260

2920

_ 3390

CI

17

1260

2300

3850

5150

Ar

18

1520

2660

3950

5770

K

19

418

3070

4600

5860

Ca

20

590

1150

4940

6480

Sc

21

632

1240

2390

7110

Ti

22

661

1310

2720

4170

V

23

648

1370

2870

4600

Cr

24

653

1590

2990

4770

Mn

25

716

1510

3250

5190

Fe

26

762

1560

2960

5400

Co

27

757

1640

3230

5100

Ni

28

736

1750

3390

5400

Cu

29

745

1960

3350

5690

Zn

30

908

1730

3828

5980

Ga

31

577

1980

2960

6190

Ge

32

762

1540

3300

4390

Br

35

1140

2080

3460

4850

Sr

38

548

4120

5440

Sn

50

707

1060

1410

53

1010

1840

2940

2040

3930

4030

56

82

502

716

966

1450

Ba

Pb

36

4540

3390

3080

4080

9746 H2 CHEMISTRY (2008)

Bond energies

(a)

Diatomic molecules

Bond

H-J-i

D-O

N"N

0=0

F-F

Cl-CI

Br-Br

I-I

H-F

H-el

H-Br

H-I

(b)

Energy/kJ mor'

436

442

994

496

158

244

193

151

562

431

366

299

Polyatomic molecules

Bond

c-e

C=C

C"C

C~C

(benzene)

C-H

c-el

C-Br

e-I

C-O

C=O

e-N

C=N

CiiN

N-H

N-N

N=N

O--+i

0-0

Sf-.CI

Sf-H

Si--O

Si-Si

S-Cl

s-H

s-s

Energy/kJ mol-'

350

610

840

520

410

340

280

240

360

740

305

610

890

390

160

410

460

150

359

320

444

222

250

347

264

37

9746 H2 CHEMISTRY (2008)

Standard electrode potential and redox potentials, E e at 298 K (25 DC)

For ease of reference, two tabulations are given:

(a) an extended list in alphabetical order;

(b) a shorter list in decreasing order of magnitude, i.e. a redox series.

(a)

E"" in

alphabetical order

EeN

Electrode reaction

Ag' + e'

Ai" + 3e

Sa:- + 2e'

Br, + 2e'

Ca" + 2e'

CI, + 2e'

2HOCI + 2H' + 2e'

Co" + 2e'

Co 3 - + e-

[Co(NH')6I" + 2e'

Cr" + 2e'

Cr" + 3e'

Cr" + e'

Cr,O," + 14H' + 6e'

.

Cu +e

Cu" + 2e'

Cu" + e'

(Cu(NH,),l" + 2e'

F, + 2e'

Fe" + 2e'

Fe" + 3e'

Fe" + e'

(Fe(CN)6I" + e'

Fe(OH), + e'

2H' + 2e'

I, + 2e'

K+ + e'

U+ + eMg" + 2e'

Mn" + 2e'

Mn" + e'

Mn02 + 4H' + 2e'

MnO, + e'

MnO, + 4H' + 3e'

MnO, + BH' + 5e'

NO,' + 2H' + e'

NO,' + 3H' + 2e'

NO,- + 10H' + Be'

Na+ + e'

Ni" + 2e'

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

Ag

+0.80

Al

¡¤1.66

Ba

¡¤2.90

2Br-

+1.07

Ca

¡¤2.87

2CI'

+1.36

CI, + 2H,O

+1.64

Co

¡¤028

Co"

+1.82

Co + 6NH,

¡¤0.43

Cr

,0.91

Cr

¡¤0.74

Cr"

¡¤0.41

2Cr" + 7H,O

+1.33

Cu

+0.52

Cu

.

Cu

+0.34

Cu + 4NH,

-0.05

2F

+2.87

Fe

-0.44

+0.15

Fe

-0.04

Fe"

+0.77

(Fe(CN)6I"

+0.36

Fe(OH), + OH

-0.56

H,

0.00

2r

+0.54

K

-2.92

Li

-3.04

Mg

-2.38

Mn

Mn 2+

-1.18

+1.49

Mn" + 2H 2O

MnO;'

+1.23

Mn02 + 2H,O

+1.67

Mn" + 4H,O

+1.52

+0.56

NO, + H,O

+0.81

HN0 2 + H,O

+0.94

NH; + 3H 2O

Na

+0.87

Ni

-0.25

38

-2.71

9746 H2 CHEMISTRY (2008)

IN,(NH,).i" + 2e

~

N, + 6NH,

-051

H,O, + 2H'

2e

~

2H,0

+1.77

0, + 4H' + 4e

~

2H,0

+ 1 23

0, + 2H,0 + 4e

~

40H

+0.40

..

H,O,

+0,68

II, / 201-1'

-083

-

Pb

-0.13

t

0, + 2H' + 2e

2H,O + 2e

Pb" + 2e

Pb" + 2e

-'

~

Pb"

+1,69

PbO, + 4H' + 2e

~

Pb" + 2H,0

+1.4 7

SO.... + 4H' + 2e

~

SO, + 2H,0

+0,17

S,O,"+ 2e

~

2S0.."

+2.01

2S,0,'

+0.09

Sn

-0.14

--

Sn"

+0,15

=

V

V'¡¤

-026

V'¡¤ + H,O

+0.34

S.,O.'"+ 2e

Sn" + 2e

Sn'/' + 2e

V'¡¤ + 2e

v3 ' + e

VO,¡¤ + 2H' + e

=

~

~

=

-1.20

VO,' + 2H' + e

~

VO,¡¤ + H,O

+1,00

VO; + 4H' + e

,-

VO,¡¤ + 2H,O

+1.00

Zn" + 2e

~

Zn

-0.76

1111 ionic states refer 10 aqueous ,ons but other state symbols have been omitted,

(b)

E" in decreasing order of oxidising power

(see also the extended alphabetical list on the previous pages)

E'N

Electrode reaction

F, + 2e'

~

S,O,"+ 2e'

~

H,O, + 2H, + 2e'

MnO; + 8H' + 5e

PbO, + 4H' + 2e'

2F'

2S0,,.

+2,87

+2.01

~

2H,0

+1,77

~

Mn" + 4H,0

+1,52

~

Pb" + 2H,O

+1.47

+1.36

~

2C/'

Cr,O," + 14H' + 6e'

~

2Cr" + 7H,0

+1,33

Br, + 2e'

~

2Br'

+1.07

NO; + 2H' + e'

~

NO, + H,O

+0.81

Ag' + e'

~

Ag

+0,80

Fe" + e'

~

Fe"

+0.77

I, + 2e'

~

21'

+0,54

0, + 2H,O + 4e'

~

40H'

+0.40

Cu" + 2e'

~

Cu

+0,34

sol' + 4H' + 2e'

=

SO, + 2H,0

+0,17

Sn" + 2e'

~

Sn"

+0,15

+0.09

CI, + 2e

S,O.'"+ 2e'

=

2S,O,'-

2H' + 2e'

=

=

H,

0.00

Pb

-0.13

Sn" + 2e'

=

Sn

,0.14

Fe" + 2e'

=

Fe

-0.44

Zn" + 2e'

=

Zn

-0.76

Pb" + 2e'

39

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