water potential?

Question

If plant cell has lower water potential than its surrounding environment and if pressure equals zero,
-is the cell hypertonic ( in terms of solute concentration) or hypotonic to its environment?
- Will cell gain or lose water?
-Explain
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A beaker contains a dialysis bag containing 0.1% sucrose solution submerged in a 0.4% sucrose solution.
- Is the greatest water potential inside the beaker or bag?
- Will water move into or out of the bag?

Answer 1

1) if the net movement of water in and out of the cell equals zero, then it is a isotonic environment



2) you have more sucrose in the solution. more means hyper. So you have a hypertonic solution. in hypertonic solutions, water will move out of the bag

rules of thumb:

1) hypotonic- means there is less solute in solution than in the cell. water tend to move into the cell.

2)hypertonic- means there is more solute in the solution than the cell. water tend to move out of the cell

3) isotonic - there is an equilibrium between cell and solution and so there is zero net movement of water

Answer 2

The plant cell with lower water potential will gain water from the environment. The solution is hypotonic.
Low water potential means that the cell has a higher concentration of solute and a lower concentration of water than the environment. Therefore, more water will diffuse into the cell than the amount of water that diffuses out of the cell.

Note: Your question asks if the cell is hypertonic. I have always thought of the solution in the environment as being hypertonic or hypotonic for that particular cell. In this case, more water goes in, so the solution is hypotonic. Let the O in the middle of hypotonic tell you that the cell swells up o o o O.

If the solution is hypertonic to the cell, then the cell shrinks. Let the er in the middle of the word hypertonic tell you that the cell shrrrrrinks. That means that more water goes out of the cell than the amount of water that enters the cell. So the water must have a higher concentration inside the cell than outside. The solute concentration is just the other way around.

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Greatest water potential just means highest concentration of water. 0.4 is more than 0.1, so the greatest water potential is in the beaker (outside the bag).
Water goes from higher concentration to lower concentration, or from greater water potential to lesser water potential. In this case, water moves from the beaker into the bag.

Answer 3

If the bag is placed in a hypotonic solution, water will enter into the bag causing it to swell (lyse). If the bag is placed in an isotonic solution, water will enter and leave at an even rate. If the bag is placed into a hypertonic solution, water will run out of the bag, causing it to shrival up(crenate.)

Answer 4

Hypertonic solutions have ______ water potential.
Answer

higher

lower

no

none of the above