Consider two ionic solids, both composed of singly charged ions, that have different lattice energies. (b) If not, which solid will be more soluble in water, the one with the larger lattice energy or the one with the smaller lattice energy? Assume that solute–solvent interactions are the same for both solids. [Section 13.1]

Video transcript

hi everyone for this problem. It reads solid A. And solid B are both ionic solids composed of Singley charged ions. The lattice energy of solid A. Is greater than the lattice energy of solid B, assuming that both solids have the same solute solvent interactions. Which of the following statements is true about their solid abilities. So we're talking about solid ability here and we have salutes and solvents that we're dealing with. So something that we're going to need to recall is change in entropy. So the change in entropy of our solution is going to equal everything that we're dealing with. So we have a solute and a solvent and this is going to make a solution. So our change in entropy of our solution is going to equal our change in entropy of our salute plus our change in entropy of our solvent plus our change in entropy of the mixture. Okay. Our mixture is our salute plus our solvent. Okay. And so here are lattice energy that they mention. And the problem, the main part is going to be the salute for our lattice energy because entropy is needed to separate salute. So we are assuming that we have the same solvent because we have we're told to assume that both solids have the same solute solvent interaction. So these two we are assuming are the same. The salute and the solvent. So now what we can do is look at the lattice energy to determine which one is going to be talking about the Saudi abilities. Okay, so a lower lattice energy is less endo thermic and which one is our lower lattice energy here. So the lattice energy of solid A. Is greater than the lattice energy of solid B. So that means solid B. Has the lower lattice energy. Okay. A higher lattice energy is more endo thermic. So our higher lattice energy is solid A. And with the lattice energy we're looking at our change in entropy of the Saw You. Okay? And so in terms of soluble it e the lower lattice energy because it's less endo thermic, it's going to be more soluble. Let's move this over so it doesn't cut off the screen so it's more soluble and the higher lattice energy because it's more endo thermic, it's going to be less soluble. Okay, so in terms of all of our answer choices are correct answer choice here is going to be d. Solid A is less soluble in water than Solid B. That's the end of this problem. I hope this was helpful