Sea water contains 29.25% NaCl and 19% MgCl 2 by weight of solution. The normal boiling point of the sea water is °C (Nearest integer) Assume 100% ionization for both NaCl and MgCl 2 Given: K b (H 2 O = 0.52 K kg mol -1 ) Molar mass of NaCl and MgCl 2 is 58. 5 and 95 g mol -1 respectively
Text Solution
Verified by Experts116
(116)
Molality of solution= 
x 1000
Number of moles NaCl = 
= 0. 5
Number of moles of MgCl 2 = 
= 0.2
NaCl = 
x 1000
MgCl 2 = 
x 1000
= Elevation in boiling point
i=Van'tHoff factor
m = molalit
k b = molal elevation constant
= 16.077
Boiling point of sea water
= 116.077°C
116 °C (Nearest integer)
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