Solution A contains 7 g/L of `MgCl_(2)` and solution B contains 7 g/L of NaCl. At room temperature, the osmotic pressure of :

Options

A. Solution A is greater than B
B. Both have same osmotic pressure
C. Solution B is greater than A
D. Can't determine

Answer

C

Explanation

Concentration of NaCl solution
`=(7)/(58.5)=0.119M`
Concentration of `MgCl_(2)` solution
`=(7)/(95)=0.074M`
Hence, particles (ions) in NaCl solution
(B) = `2xx0.119=0.238M`
Hence, particles (ions) in `MgCl_(2)` solution
`(A)=3xx0.074=0.222M`
As the particles in solution B (NaCl) is more than in solution A, the osmotic pressure of solution B will be greater than that of solution A.