Halogenoalkanes

Question 1

what do halogenoalkanes have?

Answer 1

different rates of substitution

Question 2

What are the bond energies for different halo-alkanes?

Answer 2

c-f is the strongest bond
c-i is the weakest bond

Question 3

what will reacting halogenoalkanes with aqueous silver nitrate result in?

Answer 3

chlorides make white precipitate of silver chloride. bromides make a cream precipitate of silver bromide. iodides make a pale yellow precipitate of silver iodie

Question 4

which precipitate formation is the fastest and the slowest?

Answer 4

the formation of the pale yellow silver iodide is the fastest(fastest nucleophilic substitution reaction) (most reactive) whereas the formation of the silver fluoride isthe slowest (least reactive

Question 5

define a primary haloalkane

Answer 5

has one alkyl group attached to the carbon with the halogen atoms eg 2-bromobutane

Question 6

define a secondary halo alkane

Answer 6

has two alkyl groups attached to the carbon with the halogen atom

Question 7

define a tertiary halo alkane

Answer 7

has three alkyl groups attached to carbon atom with the halogen atom

Question 8

why is the c-h bond in a halo-alkane said to be polar?

Answer 8

it has a permanent dipole

Question 9

what states are halo alkanes at room temp and pressure?

Answer 9

liquid or gases. the bpt is dependant on the IMF that operate

Question 10

what happens to halo-alkanes bpt as the chain gets longer/bigger molecule?

Answer 10

the boiling point increases. the molecule is bigger so greater electronegativity and so greater van der waals forces

Question 11

what happens to the bpt if the atomic mass/atom size increases?

Answer 11

the boiling point due to increases in the van der waals forces of attraction