Tutorial 2.1 - Ionic Bonding and structure

Question 1

State the two factors that largely determine the strength of ionic bonding. [2

Answer 1

• charge

- ionic radius

Question 2

Draw a 3D representation of the structure of a sodium fluoride crystal. [3]

Answer 2

• 3D cube
• Na+ or F- (alternating) in circles at each corner
• correct charges on Na+ and F-

Question 3

Explain how a lithium ion forms from a lithium atom. [2]

Answer 3

• lithium loses one electron from the OUTER SHELL (forgot this bit in exam)
• so forms a 1+ charge

Question 4

Explain how the potassium manganate experiment provides evidence for the existence of ions. [1]

Answer 4

only charged particles are affected

Question 5

Explain why there is no observable change between position X and the negative electrode in the potassium manganate experiment. [1]

Answer 5

The K+ ions are colourless