a) Draw the structure of dihydroxyacetone (show all bonds).
b) Draw the structure again (showing all bonds), and this time indicate the H bonding of dihydroxyacetone to water. Remember which atoms form H bonds -- you've seen this "rule" several times. Also, each (uncharged) oxygen atom participates in 2 H bonds -- one for each of its unshared pair of electrons.
c) Based on the H bonding you showed above, do you expect dihydroxyacetone to be quite water soluble or not -- in either case, describe your answer.