5. [6 pts] a. Discuss an appropriate model for the synthesis of monodisperse ZnS particles from zinc acetate and thioacetamide. Given that zinc acetate is an ionic salt, describe the role of thioacetamide in nucleation and growth. b. Characterization of the ZnS particles by x-ray diffraction and transmission electron microscopy reveals that they are spherical in shape and polycrystalline. In this case, how would the model change