Question

Calculate the osmotic pressure at 273 k of a 5% solution of a compound a given that

Answer 1

Answer:

18.65atm

Explanation:

Osmotic presuure=i*C*R*T,

where, C=concentration of solute(in terms of Molarity)

R= Gas constant=0.082 L(atm)(mol)-1K-1

T=temperature (in Kelvin)

i=Van’t-Hoff factor(=1 for non-electrolyte)

5% urea solution means 5g urea is present in 100ml of solution.

mole of urea=weight given/Molecular weight of urea

= 5g/60gmol-1=1/12

Hence Concentration(C) of urea (in terms of Molarity)

= (mole of urea(n)/Volume of solution)*1000

={(1/12)/100}*1000

=10/12

Hence Osmotic pressure=1*(10/12)*0.082*273 atm

=18.65atm