Chemistry VERY URGENT PLEASE

A) NaOH(s) > NaOH(aq)
B) NaOH(s) + HCl(aq) > NaCl(aq) + H2O(l)
C) NaOH(aq) + HCl(aq) > NaCl(aq) + H2O(l)
Examine the 3 reaction equations, and determine the relationship between them. Demonstrate this relationship by combining the equations in a manner consistent with Hess' Law.
Write the net ionic equation for the reactions above, and then combine them in a manner consistent with Hess' Law.

So I was able to do the second equation, but I was confused o what it meant by combining them in a manner consistent with Hess' Law. This is in both questions and I have no idea what this means.

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asked by Finn
  1. Reverse equation 1 and add to equation 2 and that gives equation 3.

    posted by DrBob222

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