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Solution A contains 7 g/L of MgCl(2) an...

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 :

A

Solution A is greater than B

B

Both have same osmotic pressure

C

Solution B is greater than A

D

Can't determine

Text Solution

Verified by Experts

The correct Answer is:
C
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.
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