Solved Diffusion and Osmosis Worksheet 1. How are the | Chegg.com - Free Printable

Let's solve each part of this problem step by step.

---

Part 1: Matching Terms with Descriptors

We are given a list of terms on the left and descriptors (a–g) on the right. We need to match each term with the best descriptor, using each only once.

#### Terms:
6. Concentration
7. Diffusion
8. Equal amount of water inside a cell as outside
9. More water outside a cell than inside
10. Osmosis
11. More solute outside a cell than inside
12. Selectively permeable membrane

#### Descriptors:
a) Moves particles like oxygen into cells
b) Amount of a substance in a certain place
c) Moves water into and out of cells
d) Allows some substances through
e) [Image shows water moving into a cell]
f) [Image shows water moving out of a cell]
g) [Image shows equal water movement]

Let’s analyze:

- 6. Concentration → This refers to the amount of a substance in a given space.
✔ Match: b) Amount of a substance in a certain place

- 7. Diffusion → Movement of molecules from high to low concentration. Oxygen moves into cells via diffusion.
✔ Match: a) Moves particles like oxygen into cells

- 8. Equal amount of water inside a cell as outside → This describes equilibrium. The image labeled g shows equal water movement in and out.
✔ Match: g) (image showing balanced water movement)

- 9. More water outside a cell than inside → Water will move into the cell (hypotonic). The image e shows water entering the cell.
✔ Match: e) (water moving into cell)

- 10. Osmosis → Movement of water across a membrane.
✔ Match: c) Moves water into and out of cells

- 11. More solute outside a cell than inside → This means the outside is hypertonic; water will leave the cell. Image f shows water leaving the cell.
✔ Match: f) (water moving out of cell)

- 12. Selectively permeable membrane → A membrane that allows some substances through but not others.
✔ Match: d) Allows some substances through

---

✔ Final Matches:

6. Concentration — b
7. Diffusion — a
8. Equal amount of water inside a cell as outside — g
9. More water outside a cell than inside — e
10. Osmosis — c
11. More solute outside a cell than inside — f
12. Selectively permeable membrane — d

---

Part 2: Question 13 – Tropical Fish in Freshwater Aquarium

> You have just bought a tropical fish for your freshwater (no salt) aquarium. Unfortunately, you do not realize it is a saltwater fish, which is isotonic to salty water environments. Using your knowledge of osmosis, explain why this fish will not survive in your aquarium.

#### Explanation:

Saltwater fish are adapted to live in environments where the surrounding water has a higher solute concentration (salt) than their body fluids. Their bodies are isotonic to saltwater, meaning the concentration of solutes inside their cells is equal to that of the surrounding seawater.

In freshwater, the external environment has a much lower solute concentration than the fish’s body fluids. This makes the freshwater hypotonic relative to the fish’s cells.

As a result:
- Water will move into the fish’s cells by osmosis (from area of low solute concentration to high).
- The cells will swell and may burst (lyse), especially in the gills and other tissues.
- This causes cellular damage, disrupts homeostasis, and eventually leads to death.

✔ Answer: The saltwater fish will not survive because freshwater is hypotonic compared to its body fluids. Water will enter the fish’s cells by osmosis, causing them to swell and burst, leading to fatal cellular damage.

---

Part 3: Question 14 – Complete the Table

We are to determine whether solutes and water move inside or outside the cell based on the concentrations in intracellular and extracellular fluid.

Recall:
- Diffusion: Solutes move from high to low concentration.
- Osmosis: Water moves from low solute concentration to high solute concentration (i.e., from hypotonic to hypertonic side).

We’ll go row by row.

---

| | DIFFUSION | OSMOSIS | intracellular fluid (inside) | extracellular fluid (outside) |
|---|----------|---------|-------------------------------|-------------------------------|
| | Does SOLUTE move INSIDE or OUTSIDE? | Does WATER move INSIDE or OUTSIDE? | | |
| 1. 5% salt | 10% salt | | | |

#### Row 1: 5% salt inside, 10% salt outside
- Solute (salt): High outside → moves OUTSIDE the cell? No! Wait: solutes diffuse from high to low. So salt moves from outside (10%) to inside (5%) → INSIDE
- Water: Water moves toward higher solute concentration → outside has more salt → water moves OUTSIDE the cell.

✔ Solute: INSIDE
✔ Water: OUTSIDE

---

#### Row 2: 10% salt inside, 10% salt outside
- Equal concentration → no net movement.
- Solute: No net movement → but since question asks "INSIDE or OUTSIDE", we say neither? But likely expect: NO MOVEMENT or assume equilibrium.

But the table format implies choosing one. Since equal, no net movement → both solute and water stay balanced.

So:
- Solute: NEITHER (but if forced, maybe “no movement”)
- Water: NEITHER

But let's check if they want direction. Since concentrations are equal, no net movement.

✔ Solute: NO NET MOVEMENT (or leave blank, but probably write "neither")
✔ Water: NO NET MOVEMENT

But per instructions: write INSIDE or OUTSIDE. So perhaps:
- If equal, then no direction → but since it's required, maybe write neither?

Wait — the question says: “writing whether solutes and water move INSIDE or OUTSIDE”

So if no net movement, we can’t say either.

But perhaps in such cases, we say none or equilibrium.

However, for consistency, let’s assume:

If concentrations are equal → no movement

But the table might expect:

- For solute: no net movement
- For water: no net movement

But let’s proceed.

✔ Solute: NO NET MOVEMENT
✔ Water: NO NET MOVEMENT

---

#### Row 3: 3% glucose inside, 1% glucose outside
- Glucose: high inside → diffuses OUTSIDE
- Water: solute concentration higher inside → water moves INSIDE

✔ Solute: OUTSIDE
✔ Water: INSIDE

---

#### Row 4: 2% protein inside, 1% protein outside
- Protein: higher inside → diffuses OUTSIDE
- Water: higher solute concentration inside → water moves INSIDE

✔ Solute: OUTSIDE
✔ Water: INSIDE

---

#### Row 5: 9% salt inside, 9% salt outside
- Equal → no net movement
✔ Solute: NO NET MOVEMENT
✔ Water: NO NET MOVEMENT

---

#### Row 6: 13% water inside, 25% water outside
- Water concentration: 25% outside > 13% inside → so water is more concentrated outside
- But wait: osmosis depends on solute concentration, not water directly.

Important: Water moves from high water concentration to low water concentration, which is equivalent to moving from low solute to high solute.

So:
- Water concentration: outside = 25%, inside = 13% → higher outside → water wants to move into the cell? No!

Wait: Higher water concentration = fewer solutes

So:
- Outside: 25% water → less solute → hypotonic
- Inside: 13% water → more solute → hypertonic

Therefore:
- Water moves from outside (high water conc.) to inside (low water conc.) → INSIDE

But let’s confirm:
- Water moves from high water concentration to low water concentration.
- Here, outside has 25% water, inside has 13% → water moves INSIDE

Now, solute:
- Solute concentration: inside = 87% (100 - 13), outside = 75% (100 - 25)
- So solute is higher inside → solutes tend to move OUTSIDE

But solutes move down their concentration gradient → from high to low → so OUTSIDE

✔ Solute: OUTSIDE
✔ Water: INSIDE

---

Final Table:

| | DIFFUSION | OSMOSIS | intracellular fluid | extracellular fluid |
|---|----------|---------|---------------------|---------------------|
| | Does SOLUTE move INSIDE or OUTSIDE? | Does WATER move INSIDE or OUTSIDE? | | |
| 1. 5% salt | 10% salt | INSIDE | OUTSIDE | |
| 2. 10% salt | 10% salt | NO NET MOVEMENT | NO NET MOVEMENT | |
| 3. 3% glucose | 1% glucose | OUTSIDE | INSIDE | |
| 4. 2% protein | 1% protein | OUTSIDE | INSIDE | |
| 5. 9% salt | 9% salt | NO NET MOVEMENT | NO NET MOVEMENT | |
| 6. 13% water | 25% water | OUTSIDE | INSIDE | |

Note: In row 6, even though water is listed, we interpret it as:
- Water concentration: outside > inside → water moves INSIDE
- Solute concentration: inside > outside → solutes move OUTSIDE

This is correct.

---

✔ Summary of Answers:

#### Matching:
6. b
7. a
8. g
9. e
10. c
11. f
12. d

#### Question 13 Answer:
The saltwater fish will not survive in freshwater because freshwater is hypotonic to the fish’s body fluids. Water will move into the fish’s cells by osmosis, causing them to swell and burst, leading to cellular damage and death.

#### Question 14 Table:

| | DIFFUSION | OSMOSIS | intracellular fluid | extracellular fluid |
|---|----------|---------|---------------------|---------------------|
| | Does SOLUTE move INSIDE or OUTSIDE? | Does WATER move INSIDE or OUTSIDE? | | |
| 1. 5% salt | 10% salt | INSIDE | OUTSIDE | |
| 2. 10% salt | 10% salt | NO NET MOVEMENT | NO NET MOVEMENT | |
| 3. 3% glucose | 1% glucose | OUTSIDE | INSIDE | |
| 4. 2% protein | 1% protein | OUTSIDE | INSIDE | |
| 5. 9% salt | 9% salt | NO NET MOVEMENT | NO NET MOVEMENT | |
| 6. 13% water | 25% water | OUTSIDE | INSIDE | |

> Note: For rows with equal concentrations, “NO NET MOVEMENT” is appropriate. If the form requires “INSIDE” or “OUTSIDE”, you might leave blank or use “none”, but “NO NET MOVEMENT” is scientifically accurate.

Let me know if you'd like this formatted as a printable table!