Possible ideas for inorganic chemistry projects

[John Jones]

Iodine produces the blue colour in the presence of starch (well actually amylose). It's the classic test for starch, and same reaction that those dubious "counterfeit banknote detector" pens use

They called it the "Iodine Clock" when I was shown it, and it literally evoked gasps in the classroom.

 

[catsmate]

They called it the "Iodine Clock" when I was shown it, and it literally evoked gasps in the classroom.

It's a classic demonstration.

 

[catsmate]

They called it the "Iodine Clock" when I was shown it, and it literally evoked gasps in the classroom.

It's a classic demonstration.

BTW, for the curious this is what it looks like.