319072 The observed osmotic pressure for a 0.10 M solution of \({\rm{Fe}}{\left( {{\rm{N}}{{\rm{H}}_{\rm{4}}}} \right)_{\rm{2}}}{\left( {{\rm{S}}{{\rm{O}}_{\rm{4}}}} \right)_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{at}}{\mkern 1mu} {\mkern 1mu} {\rm{2}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}{\mkern 1mu} {\mkern 1mu} {\rm{is}}{\mkern 1mu} {\mkern 1mu} {\rm{10}}{\rm{.8}}{\mkern 1mu} {\mkern 1mu} {\rm{atm}}\).
The expected and experimental (observed) values of Van’s Hoff factor (i) will be respectively: \(\left( {{\rm{R = 0}}{\rm{.082}}{\mkern 1mu} {\mkern 1mu} {\rm{L}}{\mkern 1mu} {\mkern 1mu} {\rm{atm}}{\mkern 1mu} {\mkern 1mu} {{\rm{K}}^{{\rm{ - 1}}}}{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\)