Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

9. Solutions

Osmosis

GOB Chemistry

9. Solutions

Osmosis

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1:16 minutes

Problem 84a

Textbook Question

Select the diagram (1, 2, or 3) that represents the shape of a red blood cell when placed in each of the following a to e: (9.6)
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a. 0.9% (m/v) NaCl solution

Verified step by step guidance

Understand the concept of osmosis and tonicity: Osmosis is the movement of water across a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration. Tonicity refers to the relative concentration of solutes in a solution compared to the inside of a cell, which affects the cell's shape.

Identify the type of solution: A 0.9% (m/v) NaCl solution is considered isotonic to human red blood cells. This means the solute concentration inside the red blood cell is equal to the solute concentration in the surrounding solution.

Predict the effect of an isotonic solution on a red blood cell: In an isotonic solution, there is no net movement of water into or out of the cell. The red blood cell maintains its normal shape, which is a biconcave disk.

Relate the information to the diagrams: Examine the provided diagrams (1, 2, or 3) and identify which one represents the normal biconcave shape of a red blood cell. This shape corresponds to the cell in an isotonic solution.

Select the correct diagram: Based on the understanding of isotonic solutions and the normal shape of red blood cells, choose the diagram that matches the description of a red blood cell in a 0.9% (m/v) NaCl solution.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Osmosis

Osmosis is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. In the context of red blood cells, understanding osmosis is crucial for predicting how cells will behave in different solutions, such as isotonic, hypotonic, or hypertonic environments.

Isotonic Solutions

An isotonic solution has the same solute concentration as the inside of a cell, resulting in no net movement of water. For red blood cells, a 0.9% (m/v) NaCl solution is isotonic, meaning the cells will maintain their normal biconcave shape without swelling or shrinking.

Cellular Response to Solutions

Cells respond differently to various solute concentrations. In hypotonic solutions, cells may swell and potentially burst, while in hypertonic solutions, they may shrink. Understanding these responses is essential for predicting the shape of red blood cells in different saline environments.

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Related Practice

Textbook Question

A semipermeable membrane separates two compartments, A and B. If the levels in A and B are equal initially, select the diagram that illustrates the final levels in a to d:

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Textbook Question

Select the diagram that represents the shape of a red blood cell when placed in each of the following a to e: (9.6)

<IMAGE>

a. 0.9% (m/v) NaCl solution

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Textbook Question

Look up the composition of Ringer's solution used in the treatment of burns and wounds.

b. What is the osmolarity of the solution? Is it hypertonic, isotonic, or hypotonic with blood plasma (0.30 osmol)? Discuss possible medicinal reasons for the osmolarity of the solution.

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Textbook Question

Research information related to dialysis and answer the following questions:

a. What is the difference between hemodialysis and peritoneal dialysis?

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Multiple Choice

A semipermeable membrane is placed between the following solutions.

Which solution will increase in volume?

Four U tubes each have distilled water in the right arm, a solution in the left arm, and a semipermeable membrane between the arms. If the solute is LiF, which solution is most concentrated?

Identify the direction of water flow between 2 solutions separates by semipermeable membrane, where are the solute particles.

If the fluid surrounding a patient's red blood cells is depleted in electrolytes, is crenation or hemolysis more likely to occur?

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