Question

Why is solute potential always negative? Explain y_w = y_s + y_p

Answer 1

When a solute is dissolved in water, it reduces the water potential because water concentration in a solution is less than that in pure water. The measure of reduction in water pollution because of solute is called solute potential. Since solute potential always has a negative impact on water potential, its value is always negative.

y_w = y_s + y_p 

Here, y_w - water potential, y_s - solute potential and y_p - pressure potential.