Pure Alum

First Chemistry Practical: trying to obtain pure alum from the above China made Pepsi light:) come to think of it I'm not too sure if Singapore sells Pepsi light...hmmm...Anyway...scraping the dye of the can was the tedious part...the rest were pretty interesting but a long wait...sometimes even the spontaneous chemical reactions take time to complete......and FINALLY.....FROM THE ABOVE TO THIS: