Solutions

Solid Lead nitrate is dissolved in 1 litre of water. The solution was found to boil at 100.15\(^\circ\)C. When 0.2 mol of NaCl is added to the resulting solution, it was observed that the solution froze at \(-0.8^\circ\) C. The solubility product of PbCl\(_2\) formed is __________ \(\times\) 10\(^{-6}\) at 298 K. (Nearest integer)

Given : \(\mathrm{K_b=0.5}\) K kg mol\(^{-1}\) and \(\mathrm{K_f=1.8}\) K kg mol\(^{-1}\). Assume molality to the equal to molarity in all cases.