What happens when 0.4M NaCl is added to elodea cell?

Question

I know with 4%, it is hypertonic and plasmolysis occurs (so cell shrinks (?)). With 0.4%, it is hypotonic and the cell ____(shrinks/expands)? 4M causes the cell to expand and plasmolysis also occurs.
But what about 0.4M NaCl being added to the elodea cell? Is it hypotonic or hypertonic? And what shape changes occur? It's got me stumped.
Thanks!

I'm more wondering on how the concentration of the elodea leaf and the NaCl work...
At what point will concentrations become hypertonic/hypotonic based on the elodea leaf concentration?
I'm just not quite sure how to know what is hypo/hyper.

Answer 1

.4Mol per L NaCl((22.9897+35.453)gramsNaCl)/mol of NaCl)= 23.3771 grams NaCl per liter.

23.3771 grams NaCl/1000

.0233771 grams/ml=%

so this is less than .4% and that is why they lyse and stuff

Answer 2

If the concentration of the solution outside of the cell is higher than inside the cell, the cell will shrink. If the concentration of the solution outside of the cell is lower than inside of the cell, the cell will expand because water will move into the cell. Plain and simple....water will move in the direction of greater concentration.