Crystallization II

Crystals are beautiful, but more beautiful are the processes of forming crystals, i.e. crystallization. This film recorded the crystallization processes of 5 salts. We first added droplets of saturated salt solutions on glass slides. The evaporation of water initiated the crystallization processes inside the droplets, which were captured by time-lapse photography. (Photography: Yan Liang)

Teachers can download a Worksheet for using this film in classrooms.

 
 
Crystallization of table salt (sodium chloride)

Crystallization of table salt (sodium chloride)

Crystallization of potassium nitrate

Crystallization of potassium nitrate

Crystallization of potassium chromate

Crystallization of potassium chromate

Crystallization of potassium chromate

Crystallization of potassium chromate

Crystallization of ammonium chloride

Crystallization of ammonium chloride

Crystallization of ammonium chloride

Crystallization of ammonium chloride

Crystallization of potassium dichromate

Crystallization of potassium dichromate

Crystallization of potassium dichromate

Crystallization of potassium dichromate


You may wonder, what does "II" mean in the film name? Well, there is a film (below) called Crystallization from Beautiful Chemistry three years ago.