What would happen to water in a black whole?
A marshmallow on a Neutron star (which is a object with incredible mass but not as much as a black hole) would blow up with the force of an Atomic bomb, so...
I think that the atoms would be ripped apart instantly, down to the bosons, quarks, & leptons being ripped (BOOM). Or, the atoms would implode into nothing.
Note: This is all hypothetical, because water could not get to the singularity unscathed to be ripped/imploded because on its way there it would be stretched to spaghetti. Literally.