Consider two solutions separated by a semipermeable membrane, as shown in the illustration to the right. The membrane allows the passage of small molecules and ions, but not large molecules like polysaccharides or proteins. Solution A contains a 10% solution composed of glucose and the protein albumin dissolved in water. Solution B contains a 5% solution of NaCl in water. Indicate whether each substance in the system would Solution A Solution EB flow into Solution A, Solution B, or neither. a Water b NaCI c Albumirn d Glucose
Answers
Explanation:
B nacl.
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From solution A, only glucose and water pass through the semipermeable membrane into solution B. From solution B, both NaCl and water pass through the semi permeable membrane into solution A.
• A semipermeable membrane is
a membrane that allows only some molecules to pass through it, while restrict the others.
• It has been mentioned in the question that the semipermeable membrane allows only small ions and molecules to pass through it, and not the large molecules like proteins and polysaccharides.
• Solution A contains 10% glucose and the protein, albumin dissolved in water. Solution B contains 5% NaCl in water. Following the condition given, only glucose and water from solution A passes into solution B as glucose is a monosaccharide, and water molecules are small in size. Albumin being a protein does not pass through the membrane into solution B.
NaCl being a salt and small molecule easily passes through the membrane into solution A. Water molecules from solution B also pass into solution A due to their small size.