Using the van\'t Hoff factors in the table below, calculate the mass of solute r

Question

Using the van't Hoff factors in the table below, calculate the mass of solute required to make each aqueous solution. you can rearrange the equation to solve for the solute mass, mass solute (molar mass)(L soln) R-Ti Van't Hoff factors at 0.05 m concentration in aqueous solution Inserting the values then gives Solute Nonelectrolyte NaCl MgSO4 MgCl2 Expected Measured (3.98atm) (120.38 g/mol)(0.252 L) (0.08206 L-atm/(K-mol) (314K) (1.3) mass solute = 2.7 2.6 3.4 Part C K2SO4 FeCls Calculate the mass of solute required to make an iron(III) chloride solution containing 257 g of water that has a boiling point of 109 ° C Express your answer using three significant figures. You may want to reference (Pages 609-610) Section 13.7 while completing this problem. Submit Previous Answers Request Answer

Explanation / Answer

1) DTb = i*kb*m

DTb = Tb-T0

T0 = boiling point of solvent(water) = 100 C

Tb = boiling point of solution = 109 C

m = molality of solution = (w/M)*(1000/ W in g)

   = (w/162.)*(1000/257)

i = vanthaff factor of FeCl3 = 3.4

kb of water = 0.512 °C/m

(109-100) = 3.4*0.512*(w/162)*(1000/257)

w = weight of the solute(FeCl3) = 215.25 g

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