Silicate Garden

 

Hazards: 

Nickel salts are particularly toxic

Chemicals and Solutions: 

Mangenous sulfate

Ferric Ammonium sulfate

Copper sulfate

Nickel ammonium sulfate

Cobalt chloride

3.0 liters of Commercial Silicate Solution

Distilled water

Materials: 

Procedure: 

Hint: 

Discussion: 

Crystals are dropped into the silicate solution.  The metal ions react with the sodium silicate to form a thin membrane of insoluble metal silicate.  Water penetrates the membrane by osmosis, causing it to expand and burst.  A new membrane then forms and the process repeats causing a column of colored metal silicate to form.

To schedule a demonstration, please send an email to the demonstration lab.

 

Contact:

Eric Camp

Lecture Demonstration Technician

Bagley Hall 171

(206) 543-1606

ericcamp@uw.edu

 

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