3.1.3 (b&s) ionic bonding

Question 1

what does ionic bonding happen between?

Answer 1

metals and non-metals

Question 2

definition: ionic bonding

Answer 2

the electrostatic force of attraction between oppositely charged ions

Question 3

what do ionic compounds exist as?

Answer 3

giant lattices

Question 4

what does an ionic lattice look like?

Answer 4

Question 5

what is the melting and boiling points of ionic bonding like?

why?

Answer 5

high melting/boiling points

because the giant lattices are held together by strong electrostatic forces between oppositely charged ions. therefore a lot of energy is required to overcome these forces

Question 6

are ionic compounds soluble?

why/why not?

Answer 6

yes

ionic compounds tend to dissolve in water as water molecules are polar

Question 7

can ionic compounds conduct electricity?

Answer 7

yes, but only when melting or dissolved in water

because the ions are then free to move and can therefore carry a charge

Question 8

what affects the strength of an ionic bond?

Answer 8

the ratio of the charge of an ion to its volume

Question 9

example: which on is stronger, why?

(NaCl or KCl)

Answer 9

NaCl is stronger than KCl because:
- Na+ has a higher charge density than K+ because it has the same charge but a smaller radius
- therefore the electrostatic attraction between Na and Cl is stronger than K and Cl