To be picky about pH, it really can't be the case that when OH- and H+ have equal concentrations, the log is 7.000000000000 (in units of moles/liter, no less). Looking into this, I found that the Wikipedia article on pH first makes the usual, impossible statement

In solution at 25 °C, a pH of 7 indicates neutrality (i.e. the pH of pure water) because water naturally dissociates into H+ and OH− ions with equal concentrations of 1×10−7 mol/L.

then later says that the actual number, at 25°C, is 6.998 ± 0.001. So, you see, when a solution is a pH 7, it's actually acid. Beware!

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