Red blood cells are isotonic to a solution that is 0.9% sodium chloride. These same cells are _______________ to a solution that is 0.9% sodium sulfate.

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A 0.9% sodium sulfate solution has a higher osmolarity than a 0.9% sodium chloride solution because sodium sulfate dissociates into more ions. Therefore, the red blood cells would be hypotonic to the sodium sulfate solution, causing them to shrink.

Red Blood Cells Are Isotonic to a Solution That Is