Multiple Choice
What is the movement of water across a semi-permeable membrane called?
14. Solutions
Osmosis
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Which of the following solutions is hypotonic relative to a 0.9% saline solution?
A
2.0% saline solution
B
1.0% saline solution
C
0.5% saline solution
D
0.9% saline solution
Verified step by step guidance1
Understand the concept of tonicity: Tonicity refers to the relative concentration of solutes in two solutions separated by a semipermeable membrane. A hypotonic solution has a lower concentration of solutes compared to another solution.
Identify the reference solution: In this problem, the reference solution is a 0.9% saline solution.
Compare the concentrations: Evaluate the concentration of each given solution relative to the 0.9% saline solution.
Analyze each option: A 2.0% saline solution is hypertonic (higher concentration), a 1.0% saline solution is slightly hypertonic, a 0.9% saline solution is isotonic (same concentration), and a 0.5% saline solution is hypotonic (lower concentration).
Conclude which solution is hypotonic: Based on the analysis, the 0.5% saline solution is hypotonic relative to the 0.9% saline solution.
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