Those are the reactions:
$$\ce{(H2N)2CO + 3 H2O -> CO2 + 2 NH4+ + 2OH-}$$ $$\ce{CH3COCH2COCH3 + OH- -> acac- + H2O}$$ $$\ce{CrCl3.6H2O -> Cr3+ + 3Cl- + 6H2O}$$ $$\ce{Cr3+ + 3acac- -> Cr(acac)}3$$
I don't get from where comes the $\ce{C5H8O2}$ in reaction #2!