alkenes

Question 1

whats the general formula for alkenes

Answer 1

CnH2n

Question 2

whats the definition of an unsaturated molecule

Answer 2

contains at least 1 double bond

Question 3

define a stereoisomer

Answer 3

same molecular formula and structural formula but arranged differently

Question 4

what is an electrophile

Answer 4

lone pair acceptors

Question 5

what is an addition reaction

Answer 5

a reaction where 2 atoms combine without any other products

Question 6

what is polymerization

Answer 6

turning single monomers into a polymer by causing a chain of repeating monomers

Question 7

define what a pi bond is

Answer 7

pi bonds is where the p orbitals overlap sideways

Question 8

define a sigma bond

Answer 8

sigma bonds are strongest covalent bonds, owing to the direct overlapping of the participating orbitals

Question 9

ways to know if a molecule has E-Z isomerism

Answer 9

• if it has a double bond (restricts motion )
• two different groups on each carbon of the double bond

Question 10

describe alkenes boiling points

Answer 10

alkenes has a slightly lower boiling point than alkanes as there is less electrons and therefore require less energy to overcome.
alkenes also have less bonds to break.

Question 11

describe the solubility of alkenes

Answer 11

alkenes are non polar and are strongly covalently bonded therefore cant form hydrogen bonds with water molecules

Question 12

how to test for alkenes (2 tests)

Answer 12

bromine water (orange to colorless)
potassium permanganate (purple to colorless)

Question 13

in electrophilic addition why would one product be favored

Answer 13

the most surrounded carbon cation is more stable and therefore favored