Calculate the mass of calcium chloride in the solution assuming deltaTf= 4 degrees Celsius

Question

Calculate the mass of calcium chloride in the solution assuming deltaTf= 4 degrees Celsius

Given: MW (Calcium chloride)= 110.98 g/mol

Assume that the density of the solvent is 1 g/mL

Answer 1

CaCL2 ---> Ca+++2 CL-

it is  astrong electrolyte so 1=1+(3-1)*1= 3

for Tf =4°C osmolarity is 4/1.86=2.151

osmolarity = 3*molarity

so molarity = 2.151/3=0.717

and the mass is 0.717*110.98=79.56g/L