Explain what will happen to the red blood cell if it is placed in a solution that is 90% water and 10% salt. Is the cell hypotonic or hypertonic to the solution?

Hypertonic, and the cell will burst.

Explanation:

Assuming that the red blood cell has equal concentrations of water and salt at the start, the cell has a greater percentage of solute concentration than the solution that it's placed in, which makes the cell hypertonic to the solution. Because of this, water from the solution will diffuse into the cell, going from an area of low solute concentration to high solute concentration. As the water rushes into the cell, the red blood cell will burst.

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