Which of the following sets of solutions of urea (mol. mass 60 g mol-1) and sucrose (mol. mass 342 g mol-1) is isotonic?

Question

Which of the following sets of solutions of urea (mol. mass 60 g mol-1) and sucrose (mol. mass 342 g mol-1) is isotonic? (A)  9.1 gL-1 urea and 6.0 gL-1 sucrose (B)  3.0 gL-1 urea and 3.0 gL-1 sucrose (C)  6.0 gL-1 urea and 9.0 gL-1 sucrose (D)  3.0 gL-1 urea and 17.1 gL-1 sucrose

Tardigrade Admin · Accepted Answer

Key Idea Isotonic solutions are those solutions which have same osmotic pressure at a given temperature Formula for osmotic pressure, π =CRT

Q. Which of the following sets of solutions of urea
(mol. mass $60 g m o l^{- 1}$ ) and sucrose
(mol. mass $342 g m o l^{- 1}$ ) is isotonic?

$9.1 g L^{- 1}$ urea and $6.0 g L^{- 1}$ sucrose

$3.0 g L^{- 1}$ urea and $3.0 g L^{- 1}$ sucrose

$6.0 g L^{- 1}$ urea and $9.0 g L^{- 1}$ sucrose

$3.0 g L^{- 1}$ urea and $17.1 g L^{- 1}$ sucrose

Key Idea Isotonic solutions are those solutions which have same osmotic pressure at a given temperature

Formula for osmotic pressure, $π = CRT$

Q. Which of the following sets of solutions of urea (mol. mass 60gmol−1) and sucrose (mol. mass 342gmol−1) is isotonic?

9.1gL−1 urea and 6.0gL−1 sucrose

3.0gL−1 urea and 3.0gL−1 sucrose

6.0gL−1 urea and 9.0gL−1 sucrose

3.0gL−1 urea and 17.1gL−1 sucrose