Well pure brimstone probably would ignite itself in the air and set the naphta on fire. I don't know if that's what you wanted to hear though...

While I'm no professional chemist I off the top of my head don't know a reaction including the said chemicals which would be able to rip oxygen out of the water to also burn the "victim" underwater...

Apart from that: No - that what's shown in the AVP 2 movie probably won't work...