hydrogen chp 10

Question 1

The proton, H+

Answer 1

the high charge/radius ratio,
hard acid,
highly polarizing
very strong Lewis acid,
attacking atoms or molecules such as He
or H2
, to form HHe+ or H3
+ in the gas phase

Question 2

The proton, H+
polarizing or polarizability

Answer 2

polarizing

Question 3

• The hydride ion, H-
  polarizing or polarizability

Answer 3

Highly polarizable
The radius depends on the atom attached

Question 4

Properties and reactions of hydrogen 1A

Answer 4

It has one valence electron, however, it has
higher ionization energy (1312 kJ/mol), it is not a metal

Question 5

Properties and reactions of hydrogen 17A

Answer 5

it can gain one electron forming hydride,
however, it has lower electron affinity (73 kJ/mol).

Question 6

BP high or low

Answer 6

H2 has weak intermolecular forces, therefore its b.p is 20 K

Question 7

Bond enthalpy and bond length

Answer 7

High bond enthalpy (436 kJ/mol)
short bond length (74 pm)

Question 8

Homolytic dissociation

Answer 8

H2
(g) -> H(g) + H(g) rH = +436 kJ/mol

Question 9

Heterolytic dissociation

Answer 9

H2 (g)-> H+ (g) + H- (g) rH = +1675 kJ/mol

Question 10

Activation energy

Answer 10

high

Question 11

rxn w/02

Answer 11

2H2
(g) + O2
(g) -> 2H2O(g) rH = - 242 kJ/mol

Question 12

inert molecule

Answer 12

reactions require catalyst or initiations by radicals

Question 13

saline hydrides

Answer 13

li
na
k
rb
cs
mg
ca
sr
ba

Question 14

intermediate hydrides

Answer 14

cu
zn

Question 15

molecular hydrides

Answer 15

be
+
all non-metals

Question 16

metallic hydrides

Answer 16

sc ti v cr - - - ni
y zr nb - - - - pd
la hf ta

Question 17

unknown hyrdies

Answer 17

8A

Question 18

saline

Answer 18

H+ s block

Question 19

molecular

Answer 19

H+ Be+ p block

Question 20

metallic

Answer 20

H+ d-block
H+ f block

Question 21

molecular hydrides bond

Answer 21

covalent

Question 22

saline hydrides property

Answer 22

non-volatile
con-conductive

Question 23

metallic hydrides property

Answer 23

non-stoichiometric
conducting

Question 24

Complex ion formation

Answer 24

BH4–> tetrahydrate borate-> borohydrate
AlH4–> tetrahydrate aluminate-> aliminium hydrate

Question 25

1A+H delta G formation

Answer 25

aşağı indikçe artar less negative

Question 26

2A+H delta G formation

Answer 26

aşağı indikçe azalır more negative

Question 27

3A+H delta G formation

Answer 27

B2H6

Question 28

4A+H delta G formation

Answer 28

aşağı indikçe artar

Question 29

5A+H delta G formation

Answer 29

aşağı indikçe artar

Question 30

6A+H delta G formation

Answer 30

H20 -277 çok düşük

Question 31

7A+H delta G formation

Answer 31

HF -273 çok düşük

Question 32

p block+ H delta g form

Answer 32

for p block E-H bond strength azalır poor overlap between 1s orbital of +1 and diffuse s-porb of E

Question 33

d block+ H delta g form

Answer 33

metal hydrides bond strength artar better overlap h 1s+d of metal

Question 34

Reactions of binary compounds E-H-> E+H Similar electroneg (hydrocarbon)

Answer 34

Homolytic dissociation E-H-> E.+H. (radical) neutral

Question 35

Reactions of binary compounds E-H-> E+H e>h electroneg

Answer 35

bronsted acids E-H-> E-+H+ protonic

Question 36

Reactions of binary compounds E-H-> E+H h>e elecctroneg

Answer 36

hydride transfer E-H-> E++H- hydric nabh4

Question 37

tritium decomposition

Answer 37

3 3 H-> He+ beta- 1 2

Question 38

tritium produced

Answer 38

1 6 3 n+Li-> H+ 4He2 0 3 1

Question 39

isotopically subs molecules

Answer 39

h2 and d2 h2o d2o

Question 40

isotopically subs molecules bond enthalpy and bp

Answer 40

bond enthalpy artarsa bp artar d2>h2 d2o>h2o

Question 41

nuclear fusion

Answer 41

2 3 4 1 H+ H-> He+ n+17.6 mev 1 1 2 0 not radioactive

Question 42

nuclear fission

Answer 42

235u+ n->187Te+ 97Zr radioactive

Question 43

primary isotope effect which is more fast h2 or d2 formation

Answer 43

2h++ 2e- ->h2 (g) fast 2d++ 2e- ->d2 (g) fast

Question 44

secondary isotope effect complex containing nh3 and complex containing nd3

Answer 44

d containing is faster depends on the bond strength

Question 45

o,m,p H mp & bp

Answer 45

o>p para daha straigth hemen erir kaynar ortho daha düzensiz daha zor

Question 46

o,m,p thermal conductivity

Answer 46

p>o dümdüz iletir gibi düşün

Question 47

molecular hydrides electron precise

Answer 47

no unpaired electron ch4, sih4

Question 48

molecular hydrides electron rich

Answer 48

unpaired e nh3, h2o

Question 49

molecular hydrides electron deficient

Answer 49

Bor B2H6

Question 50

R3SnH+ R'X->R'H+ R3SnX 4A

Answer 50

C 2.5 Si 1,8 Ge 1,8 Sn 1,8 aşağı indikçe e neg azalır e neg ne kadar farklıysa bond strength o kadar artar aşağı indikçe bond strength azalır benzer e neg olduğu için

Question 51

R3SnH+ R'X->R'H+ R3SnX 7A

Answer 51

F 4 no rxn Cl 3 no rxn without heat or emr Br 2,8 react spontanously at rt I 2,5 react spontanously at rt

Question 52

sym H bonding weak or strong

Answer 52

strong H-F-H-F 113 pm 113 pm

Question 53

asym H bonding weak or strong

Answer 53

weak H-Cl-H-Cl 137 pm 135 pm

Question 54

clathrate hydrate

Answer 54

h2o containing in complex molecules

Question 55

hydride gap

Answer 55

no metallic hydride formation in group7-8-9 act as catalyst

Question 56

Metallic hydride properties conducivity of ch2x and ch3

Answer 56

ch2x conductor ch3 insulator

Question 57

Hydrido H- polarizability

Answer 57

high

Question 58

Hydrido H- hard or soft

Answer 58

soft

Question 59

Hydrido H- sigma donor pi donor pi acceptor?

Answer 59

sigma donor

Question 60

in e- poor metal (EWG) H+ or H-

Answer 60

H+ EWG olduğu için withdrawladığını düşün

Question 61

in e- rich metal (EDG) H+ or H-

Answer 61

H- e- donate ettiğini düşün

Question 62

Homoleptic complex

Answer 62

only 1 type of ligand

Question 63

clathrate hydrates

Answer 63

consist of h bonded h2o cages around ions

Question 64

saline polarizable or polarizing ability

Answer 64

high polarizability towards 1A 2A except be

Question 65

b(c2h5)3 b(ch3)3 LA or LB

Answer 65

LA saline rxn addition to LA

Question 66

metallic hydride stoic?

Answer 66

nonstoichiometry