A concentration difference of a certain solute of 1.0 × 10^-² kg/m³ is maintained between the ends of a tube with a length of 3.5 m and a cross-sectional area of 0.25 m².When 0.0040 g of the solute is introduced to the tube, it takes 350 minutes for this solute to diffuse through the solvent to the opposite end of the tube.What is the diffusion constant for the solute?

Question

Quizplus · Accepted Answer

The diffusion constant (D) can be calculated using Fick's first law of diffusion: D = (m * L) / (A * ΔC * t), where m is the mass of solute, L is the length of the tube, A is the cross-sectional area, ΔC is the concentration difference, and t is the time. Substituting the given values: D = (0.0040 g * 3.5 m) / (0.25 m² * 1.0 × 10⁻² kg/m³ * 350 min * 60 s/min) = 2.7 × 10⁻⁷ m²/s.

A Concentration Difference of a Certain Solute of 1