Which solution has the highest vapor pressure? a. 20.0 g of glucose (C6H12O6) in 100.0 mL of water b. 20.0 g of sucrose (C12H22O11) in 100.0 mL of water c. 10.0 g of potassium acetate KC2H3O2 in 100.0 mL of water

Video transcript

Hi everyone today, we have a question telling us among the falling identify the solution that has the smallest vapor pressure. A 30 g of sodium chlorate and 200 ml of water. B 50 g of cyclo oxygen all in 200 ml of water Or C 50 g of one Hempton, all in 200 ml of water. So assuming that there is an ideal solution, we're going to obey routes law, which is peace solution equals X solvent times pressure of solvent. So the X solvent equals moles of solvent divided by I times moles of solute plus moles of solvent. So starting with a We have 30 g of sodium chlorate and 200 ml of water in A. c. l. 0. 3 is an electrolyte. So our I equals two. Our molar mass is 106 0. grams per mole. R. i. equals two moles of particle perm. Als assault has close molar mass with the others. Makes it have the lowest VP B. We have 50 g of cyclo octane. All In 200 ml of water. So see eight H. 16 oh is a non electrolyte. So it's I equals one. Its molar mass Is 128 .208 g per mole. It has the highest molar mass and the lowest moles of particle. So it has the highest VP four C. We have 50.0 g of one hep to gnaw and 200. mL of water. C seven H 16 Is a non electrolyte, so I equals one. Its molar mass Is 116. grams. For mold. It has a mid molar mass And I equals one so lowest moles a particle, and that makes it the middle VP. So our answer here is going to be a NAC 003. Thank you for watching. Bye.