pH of a 0.1 M monobasic acid is found to be 2. Hence its osmotic pressure at a given temperatue T K is

HA→H++A−,pH=20.1pH=2    so [H+]=0.01H+= Cα α=H+C=0.010.1=0.1 i = 1+α(n-1) i = 1+0.1(2-1) i = 1.1π=iCRT=1.1*0.1RT=0.11RT