Properties of Solutions

 

24) (a)  n = 0.045 mol I2

             m = 115 g CCl4

             I2(s) I2(l)

            

             m% = miodine/msol'n x 100%

             miodine = 0.045 mol I2 x 253.80 g I2/1 mol I2 = 11 g I2

             msol'n = 11 g I2 + 115 g CCl4 = 126 g sol'n

             m% = 11 g/126 g x 100% = 8.7 % I2

 

      (b)   0.0079 g Sr2+/kg

             ppm = msolvent/msol'n x 106

             ppm = 0.0079 g Sr2+/103 g x 106 = 7.9 ppm Sr2+