Free the World

This is off the wall, weird science stuff. Not real according to current scientific thinking, but what if ...

Ok, so theoretically the frequency of disassociation for water is 42.8 kHz (http://www.keelynet.com/energy/docx.htm).
So to set up a standing wave we would need to apply ultrasound at 42.8 kHz to a column of water matching a multiple of the wavelength.
To determine the wavelength we need the speed and frequency.
The speed of sound in pure water is 1485.72546 m/s at 70 F or 21.1111111 C
Wavelength = Speed/Frequency for second harmonic
1485.72546 / 42800 = 0.034713211682242990654205607476636 m or 1.3666618773 inches

So set up a tube (now I know tube diameter has to come in to play somehow here) with 1.36666 inches of pure water in it, hit it with ultrasound at 42.8 kHz and it should go poof into vapor or o2 and h2. Instant pressurization for compressed air machinery or vehicles.

Wouldn't it be cool!