Question

The relationship between DPD and $\Psi w$ can be expressed as

• A. $DPD=\Psi w$
• B. $Psiw-DPD=0$
• C. $\frac{DPD}{\Psi w}=0$
• D. $\Psi w=-DPD$

Answer 1

The correct option is D $\Psi w=-DPD$

The pressure exerted by diffusing particles is called as diffusion pressure. When solute is added, the diffusion pressure of a solution is lowered. The amount by which diffusion pressure of a solution is lower than that of its pure solvent is known as diffusion pressure deficit, which was described as suction pressure by Renner (1915). The water potential has same magnitude as DPD but negative sign.