imf

Question 1

4 things that must be included in diagram of H bonding

Answer 1

• partial charges
• lone pair on F/O/N
• correct atoms
• F/O/N–H–F/O/N bond angle should be 180

Question 2

what determines the strength of a H bond?

Answer 2

all H-bonds are the same strength, always discuss the number of H bonds

Question 3

how is an idid formed?

Answer 3

the random movement of electrons creates and instantaneous dipole (temporary uneven distribution of charge)
this induces a dipole in neighbouring molecules

Question 4

2 factors that affect the strength of idids

Answer 4

• Mr - the higher the Mr the more electrons, therefore more polar, stronger idids (take more E to break, higher mpt/bpt)
• shape of the molecule - more linear, so pack more closely together

Question 5

why can’t the number of idids be compared?

Answer 5

idids act in all directions