1. Identify the chemical species present in the solution poured into the beaker on the left in the movie.

The solution on the left is labeled Fe(NO₃)₃ solution. Fe(NO₃)₃ is the formula of an ionic substance. The solution apperas clear and colorless, possibly a slight yellowish in color. Since Fe(NO₃)₃ is ionic the solution contains the corresponding ions; Fe³⁺ and NO₃^-.

This solution contributes the Fe³⁺ in the chemical equation above.