∵ Osmotic pressure (π)=i⋅CRT Also, according Arrhenius principle, pH=....−logH+ Given, pH=3 3=−log[H+] or [H+]=0.001 Assume HX is a monobasic acid. Then, HX=H++X− Relation between [H+] and degree of dissociation. [H+]=C⋅α α=
0.001
0.1
=0.01 i=1.01 Now, according to van't Hoff theory i=1+α=1+0.01=1.01 ∵ Osmotic pressure (π)=iCRT π=1.01×0.1×RTK−1mol−1 [R=0.08L atm