[tortoise]

And of course the reaction between the strong reducing agent sodium, and the strong oxidizer, chlorine, is strictly a matter of chance then?

/me blinks.

The outcome of the interaction is so strongly biased toward one particular result that for casual purposes we do not treat it as probabilistic, though it is. For most chemical systems which are not so biased, you end up with a more obviously probabilistic mix.

[editor-surveyor]

Stunning logic!