chemistry

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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asked by ABCD
  1. If the products are different from the reactants you have a chemical change; otherwise it's a physical change.

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    posted by DrBob222

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