Question

Choose the most correct option.

A living cell contains a solution which is isotonic with 0.3 M sugar solution. What osmotic pressure develops when the cell is placed in 0.1 M KCl solution at body temperature?

Options

• 5.08 atm

• 2.54 atm

• 4.92 atm

• 2.46 atm

Answer 1

2.54 atm

Explanation:

π = i₁M₁RT − i₂M₂RT

= [(1 × 0.3 mol dm⁻³) − (2 × 0.1 mol dm⁻³)] × 0.08205 atm dm³ K⁻¹ mol⁻¹ × 310 K

= 2.54 atm