An aqueous solution of salt contains \(20 g\) of \(NaCl\) per liter. The pressure of the solution at \(35^oC\) will be
Answer & explanation
Correct answer: option 1
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, \(\pi ≈ 8.622 atm\)