Question

  

puis LULU 1. Use the table below to calculate the il table below to calculate the final AHsol for the following solute/solvent mixtures and determine if the solute dissolves in a liquid water solvent. a. Calz b. Ca3(PO4)2 c. NaCl d. CaCO3 Species AHhydration (kJ/mol) Cal2 Ca3(PO4)2 NaCl CaCO3 Ca2+ AHlattice (kJ/mol) 1971 10,602 787 2804 Na+ Cl -1579 -406 -636 -1172 -1880 CO32- PO43-

     

Answer 1

* Answer to I] for CaI28 - Reaction for At Lattice - Calss) ang + 21 - Reaction for Alhydration con + 2003 - > Colego + 2109 If the value Attilattice & H Hydration is negative then compound will be soluble in water. .. JAH solation - A Hiattice FSH Hydration t o for Calg A Hiattice = 1971 kJ mol! - Aliwal 6920__-15 79 kimo I 0 ore 2. Total Hydration - - 1579 +2x Put all value in Equation we get Allsolution at lattice + At Hydration | A Hsol = 1971 + (-1579.)+22 : This value is positive so that compound will not be soluble in water. Hydration -

49) 2] Ca, (PO4)2 - Reaction of Allattice - Caz (Poul > 3 ca 20 + 2003 - for Hydration of ca & Polion. 3.6920' 3(-1579) = -4737 2.PO,03 = 26-1880) = -3760 So that Ali Hydration 3042®+2P082=64737)+(-3760) = (-8497) ?, AHsolution = Diketice + AHHydratich : ='(+96002) # 428497) A Hegy = +2105 kJ mol-, This value is positive so that it is not soluble an water. 3 Nach & - Reaction of AHiattice- Nattos Na + cha AHikaltice 787- - Hydration of Nal = -406 -636 - Hydration of Nepal = (-406) +(+636)=-1042 A Hsot = AMattice + OH Hydration = = 787+ (-1042) a Hool - - 255 KI mol-1 this value is negative soluble in water. so that Nach is

4) Caloze -Reaction of a Hiattice = caco - Candy + logg Alliattice 2804 ?. Hydration of Enthalpy ca20 = -1579 I coo2 = - 1179 i Total Hydration = (-1579)+(-1199) = (-2751) AHSol = Dhiattice & Aligydration = 2804 +(-2751) Also = +53 kJ molt This value is positive so that this compound is not soluble in water.