Chemistry!

Chemistry!

Year 7 and Year 8 have enjoyed seeing some chemistry demonstrations in the Science lab last week.  Both year groups got to see Golden Rain which involves a precipitation reaction followed by recrystallisation to achieve glistening yellow crystals of lead iodide.  Year 7 also got to witness the amazing Iodine Clock in which varying the concentration of one of the chemicals affects the time a colourless solution takes to suddenly turn dark blue.  Both classes were enthusiastic and impressed by the chemistry they witnessed!

Golden Rain

Iodine Clock