Golden Rain

Before I even try to teach ionic equations I check to see if my students have picked up any misconceptions about how ions behave in aqueoussolution. The precipitation of lead iodide from a solution of potassiumiodide and leadnitrate is so dramatic and engaging that I use it both with my 1114 and 1618 year old students. The younger students see this reaction when Im introducing ionic bonding. I show the reaction again to my older students and ask them to sketch particle diagrams to explain what they a