An unknown substance “A" was allowed to partition between a mixture of 150 mL water and 80 mL benzene. After titration, you found that 0.75 moles of “A" was dissolved in the water while 0.60 moles dissolved in benzene. Calculate for the partition coefficient of substance “A". What can you infer about the nature of substance “A" based on the value of the partition coefficient?

Construct the expression for Ksp for solid Ba3(PO4)2 in aqueous solution. Вa (РО:)-(s) 3D З Ва" (аq) + 2 РО.* (аq) 1 Based on your knowledge of how the solid will dissociate in aqueous solution, use the tiles to form the expression. Ksp 5 RESET [Ba-(PO:)] 2[Ba:(PO:)-] 3[Ba:(PO:)-] [Ba-(PO:).J? [Ba:(PO:):]3 [Ba*] 3[Ba*] [Ba*j [Ba*"] 3[Ba"] [PO.2] 2[PO] [PO.P [PO.] 2[PO.] [PO. P 3[PO.] [PO. P

The following equation describes the dependence of the rate constant (k) with the temperature in dynamic NMR. kgTc -AG*. exp (- RT. k = C where kg and h are physical constants, R is the ideal gas constant, T. is the coalescence temperature and AG* is the activation energy? The following table shows the units of some of these parameters. Parameters Units k s-1 To K h Js R JK-' mol-! AG* J mol- Does k increase with AG*? Explain your answer.

The first-order degradation rate constant k was determined to be 0.0125/day for contaminant A and 0.0030/day for contaminant B in a soil. Calculate the half-life T1/2 and the 95% dissipation time for these contaminants in the soil. Compare the persistence between the two contaminants.