bio & ethics Ass

Name(s) ______________________________________________

Date _________________________________________________

Chapter 3 Worksheet

1. Complete the following chart (5pts).

2. What is the formula used for calculating pH? (2pts)

3. Calculate the pH of the following and determine whether each solution is acidic or basic. (2pts),

0.001 M HCl

5.25 x 10-10 M HCl

3.2 x 10-3 M NaOH

4. Where would water fall on the pH scale? (1pt)

5. What is water? (2pts)

6. One side of the image below depicts liquid water, and the other ice. Label them appropriately.

Which side is denser? Explain why, referencing the definition of density and using the image above . (2pts)

7. Is density the same thing as mass? Explain why or why not. (2pts)

8. Based on your answers in the previous question, would ice sink or float in water? Explain, then, why it is impossible for the seas and most lakes to freeze top to bottom during the winter. (2pts)

9. What is electronegativity, and how does it affect interactions between water molecules? (2pts)

10. Study the orientation of these water molecules. Why is it unlikely that they would be arranged like this? (2pts)

11. Complete the following chart on water: (6pts)

12. Study the image below. Notice how the water spills from the cup in a rope-like shape, rather than millions of water molecules falling separately. What emergent property of water makes this possible? Explain your answer. (2pts)

13. Study the image below. What emergent property of water allows this pond skater able to stand on water like this? Explain your answer. (2pts)

14. Study the image below. What emergent property of water allows these drops to “stick” to the plant? Explain your answer. (2pts)

15. Using the information you gathered for the previous three questions, describe how properties of water contribute to the upward movement of water in a tree. (2pts)

16 Whenever my throat is sore, I always gargle a glass of salt water. In this solution, the salt is my solute, and the water is my solvent. Think of three other solutions that can be found in everyday life and determine what ingredient would be the solute, and which ingredient would be the solvent. (3pts)

22. The image to the left depicts a hydration shell – water molecules are surrounding the sodium and chloride ions in my salt water. This is taking place because the salt is being dissolved.

Notice how the water molecules face different directions depending on whether they’re around the Na+ or the Cl -. Explain why. (2pts)

17. Classify the following as hydrophilic or hydrophobic. (7pts)

18. When doing an experiment, we often need a specific amount of a substance. To get it, we need to calculate its molecular mass. (2pts)

What is the unit for molecular mass?

How is molecular mass calculated?

19. What is the molecular mass of the following substances? Round to the nearest whole number. Show your work. (7pts)

H:

O:

H2O:

ZnCl2:

AgNO3:

CH3CO2H:

Al2(SO4)3:

20. Summarize (In your own words) in at least 3-4 sentences what this chapter was about. (5pts)

Second Research Paper 4 pages (Technology)

For the  second research paper I want you to interview people about a piece of technology. From there you will follow the ANT style that we will discuss with Bruno Latour  and talk to another human being about a piece of technology. 

It can be the same piece of technology you did before or something else.  You will cite one source outside of class from a Journal in our Approved Journal List. The second research counts for  20 percent of the final grade. 

Name(s) ______________________________________________

Date _________________________________________________

Chapter 3 Worksheet

1. Complete the following chart (5pts).

2. What is the formula used for calculating pH? (2pts)

3. Calculate the pH of the following and determine whether each solution is acidic or basic. (2pts),

0.001 M HCl

5.25 x 10-10 M HCl

3.2 x 10-3 M NaOH

4. Where would water fall on the pH scale? (1pt)

5. What is water? (2pts)

6. One side of the image below depicts liquid water, and the other ice. Label them appropriately.

Which side is denser? Explain why, referencing the definition of density and using the image above . (2pts)

7. Is density the same thing as mass? Explain why or why not. (2pts)

8. Based on your answers in the previous question, would ice sink or float in water? Explain, then, why it is impossible for the seas and most lakes to freeze top to bottom during the winter. (2pts)

9. What is electronegativity, and how does it affect interactions between water molecules? (2pts)

10. Study the orientation of these water molecules. Why is it unlikely that they would be arranged like this? (2pts)

11. Complete the following chart on water: (6pts)

12. Study the image below. Notice how the water spills from the cup in a rope-like shape, rather than millions of water molecules falling separately. What emergent property of water makes this possible? Explain your answer. (2pts)

13. Study the image below. What emergent property of water allows this pond skater able to stand on water like this? Explain your answer. (2pts)

14. Study the image below. What emergent property of water allows these drops to “stick” to the plant? Explain your answer. (2pts)

15. Using the information you gathered for the previous three questions, describe how properties of water contribute to the upward movement of water in a tree. (2pts)

16 Whenever my throat is sore, I always gargle a glass of salt water. In this solution, the salt is my solute, and the water is my solvent. Think of three other solutions that can be found in everyday life and determine what ingredient would be the solute, and which ingredient would be the solvent. (3pts)

22. The image to the left depicts a hydration shell – water molecules are surrounding the sodium and chloride ions in my salt water. This is taking place because the salt is being dissolved.

Notice how the water molecules face different directions depending on whether they’re around the Na+ or the Cl -. Explain why. (2pts)

17. Classify the following as hydrophilic or hydrophobic. (7pts)

18. When doing an experiment, we often need a specific amount of a substance. To get it, we need to calculate its molecular mass. (2pts)

What is the unit for molecular mass?

How is molecular mass calculated?

19. What is the molecular mass of the following substances? Round to the nearest whole number. Show your work. (7pts)

H:

O:

H2O:

ZnCl2:

AgNO3:

CH3CO2H:

Al2(SO4)3:

20. Summarize (In your own words) in at least 3-4 sentences what this chapter was about. (5pts)