The following PEC diagram describes the potential energy and number of configurations of the unmixed state (UM : Nal(s) + H20(1)) and mixed state (M : Na+(aq) +1(aq)) of sodium iodide in water. What is true about this ionic compound? d. UM M # Config Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. It is insoluble at all temperatures It is soluble at low temperatures but insoluble at high temperatures It is soluble at high temperatures but insoluble at low temperatures d. It is soluble at all temperatures