AP Water Potential Sample Questions
Name:____________________________
1.
If a cell’s Ψ
P
= 3 bars and its Ψ
S
= -4.5 bars, what is the resulting Ψ?
2.
The cell from question #1 is placed in a beaker of sugar water with Ψ
S
= -4.0 bars.
which direction will the net flow of water be?
3.
The original cell from question # 1 is placed in a beaker of sugar water with Ψ
S
-0.15 MPa (megapascals).
We know that 1 MPa = 10 bars.
In which direction will the
net flow of water be?
4.
The value for Ψ in root tissue was found to be -3.3 bars.
If you take the root tissue
and place it in a 0.1 M solution of sucrose at 20°C in an open beaker, what is the Ψ of the
solution, and in which direction would the net flow of water be?
NaCl dissociates into 2 particles in water: Na
In
=

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