Friday
March 27, 2015

Homework Help: chem

Posted by Emily Grossman on Tuesday, March 1, 2011 at 9:44pm.

I need help classifying these as physical or chemical changes!

1. sodium metal exposed to air turns dark gray.
2. steam in a test tube condenses to moisture.
3. baking soda in vinegar releases bubbles.
4. water dissolves in vinegar to give a solution.
5. tap water and soap form an insoluble deposit.
6. solid "dry ice" slowly disappears completely.

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