For each of these solutions, determine the osmotic pressure ofthe solution at ST

Question

For each of these solutions, determine the osmotic pressure ofthe solution at STP. (Assume these solutions behave ideally.) (a) 0.199 MFeCl2 in water
__________ atm

(b) 0.045 m CoCl2 inwater (Assume the density of the solution is 1.0 g/mL.)
___________ atm

For each of these solutions, determine the osmotic pressure ofthe solution at STP. (Assume these solutions behave ideally.) (a) 0.199 MFeCl2 in water
__________ atm

(b) 0.045 m CoCl2 inwater (Assume the density of the solution is 1.0 g/mL.)
___________ atm

(a) 0.199 MFeCl2 in water
__________ atm

(b) 0.045 m CoCl2 inwater (Assume the density of the solution is 1.0 g/mL.)
___________ atm

Explanation / Answer

We Know that :     = iCRT                                         FeCl2 ------> Fe+2 +  2 Cl-         = 3 x 0.199M x0.0821 atm-L / mole -K x 273 K         =  13.380 atm         M = m x density / 1 + molecularmass of solute / 1000)              = 0.045 m x 1.0 g / ml x 1000 / 1 +183.4               = 0.244 M         = iCRT                CoCl2 ------> Co+2 + 2Cl-            =3 x 0.244M x 0.0821 atm-L / mol-K x 273 K           = 16.40 atm    

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