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April 23, 2014

Homework Help: chemistry

Posted by ABCD on Sunday, July 3, 2011 at 1:31pm.

Consider the following equations. For each, decide whether it represents a chemical reaction or a physical change.
a. SnCl4(aq) + 4H2O(l)  Sn(OH)4(s) + 4HCl(aq)
b. 4K(s) + O2(g)  2K2O(s)
c. NaCl(s)  Na+(aq) + Cl-(aq)

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