An aqueous solution of salt contains \(20 g\) of \(NaCl\) per liter. The pressure of the solution at \(35^oC\) will be

\(8.622 atm\)

The correct answer is option 1. \(8.622 atm\).

Given,

Concentration, \(C = 20 g\) of \(NaCl\) per liter

or, \(C = \frac{20}{58.44}mol/L\)

Temperature, \(T = 35^oC \text{ = }35 + 273 = 308 K\)

Gas constant, \(R = 0.0821 L\text{ atm K}^{-1}\text{ mol}^{-1}\)

We know, for osmotic pressure,

\(\pi = CRT\) where, [\(\pi \) is osmotic pressure ]

or, \(\pi = \frac{20}{58.44} × 0.0821 × 308\)

or, \(\pi ≈ 8.622 atm\)