Description: Sulfur is burned and placed in a flask containing oxygen. Sulfur dioxide is produced and dissolves in water containing an indicator, which changes color as the water becomes acidic.

This demonstration is also available on video and JCE Software: "Chemistry Comes Alive!" Vol. 2 CD-Rom.

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Source: Shakhashiri, B. Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry

Year or vol: 3 page 116