Chemistry · Oct / Nov 2023 · Paper 12 · Question 2

A crystal of sodium chloride is dropped into a beaker of water and the crystal dissolves. There are four stages in this process. 1 The water molecules collide with the ions in the crystal lattice. 2 The ionic bonds in the crystal break. 3 The ions move randomly in all directions until they are evenly spread throughout the solution. 4 The ions continue to move randomly in all directions but remain evenly spread throughout the solution. At which stages is diffusion occurring?

1. A1, 2 and 4
2. B2 and 3
3. C3 only
4. D4 only

As printed in the paper