The isobaric, isothermal diagram for the system H2OLi2(SO4)(NH4)2SO4 is given below. (a) Describe in detail the sequence of events on evaporation of a solution of composition A. (b) Calculate the maximum weight of Li2SO4 that can be added to 100g of solution A, if ammonium sulfate is still to be the first solid to separate out on evaporation. (c) Show that on evaporation of a dilute solution of the double salt Li2(SO4)(NH4)2SO4, one can never obtain a system consisting of the solid double salt in equilibrium with saturated solution