Calculate the molality of

CaCl_(2)

required to lower the freezing point of water by

-19.1\\\\deg C

if

K_(f)

for

H_(2)O

is

1.86\\\\deg (C)/(m)

and the van 't Hoff factor for a saturated solution of

CaCl_(2)

is 2.5 .\ m

Calculate the molality of CaCl2 required to lower the freezing point of water by 19.1C if Kf for H2O is 1.86C/m and the van ' t Hoff factor for a saturated solution of CaCl2 is 2.5 . m